Post-doc position in Instability and Aeroacoustics of Supersonic Twin Jets


The Universidad Politécnica de Madrid (UPM) is the oldest and largest Spanish
 technical University, with more than 4.000 faculty members, around 48.000 
undergraduate students and 6.000 postgraduates in 21 Schools of study. UPM  
Schools cover most of engineering disciplines, including Aeronautics. The School
of Aeronautics ETSIAE-UPM is one the best schools of engineering in Spain and
the oldest providing an aeronautical degree. ETSIAE-UPM was ranked 41st of the
world in Shanghai’s ranking for aeronautical engineering in 2017. 

The Dept. of Applied Mathematics at ETSIAE-UPM (http://numath.dmae.upm.es)
offers a young dynamic environment, where currently 10 PhD students and 20
academics perform research in fluids and numerical methods aerospace 
technology.


Short description:

We are looking for a post-doctoral researcher to work on an exciting project in
the fields of Computational Fluid Dynamics, Flow Instability and Aeroacoustics,
in the framework of the Project TwINJets (Turbulence, instability and noise in
supersonic twin-jets). This project is funded by the Madrid Region Government
(Comunidad de Madrid) within the "Promotion of research by young researchers"
line of the multi-annual agreement with UPM.

The project aims at the physical understanding and modelling of the main sources
of noise present in supersonic jets. High-quality CFD simulations, instability
analysis and data-driven analysis are combined to produce fast but accurate
predictive models of i) the mean flow properties, ii) the large-scale turbulent
structures and iii) the noise radiated from twin-jet configurations. 


Who and what are we looking for from you?

Mandatory technical skills and experience:

●	PhD in engineering, aeronautics, applied mathematics or physics, or
equivalent expertise.
●	Excellent computational skills and interest in CFD programming (e.g.
C++, Fortran) and fluid modelling, and/or
●	Strong background in linear stability analysis of complex flows, and/or
●	Strong demonstrated experience in industrial CFD simulations 
(meshing, pre- and post-processing, etc)

Language skills:
●	Fluent English language is a prerequisite for the role. 

You should be highly motivated and dynamic, have good communication and
analytical skills, be a stress-resistant problem solver, and be a team player
able to meet the highest quality standards. 

What do we offer?
The contract is offered for 6 months starting in November 2020, that can be
extended based on performance. We also offer to work in a stimulating, young and
multicultural environment, and to be part of a dynamic and growing research team
at ETSIAE-UPM. 


How to apply?
Please send cover letter and resume plus relevant technical papers, reports,
references, etc. to daniel.rodriguez@upm.es quoting the reference Twinjets_UPM

----

“Acción financiada por la Comunidad de Madrid en el marco del Convenio
Plurianual con la Universidad Politécnica de Madrid en la línea de actuación
estímulo a la investigación de jóvenes doctores”

Postdoc position in Computational Fluid Dynamics of High-speed Flows

Work description:

1. Primary responsibilities are to work with and modify in-house high 
perforrmance computational fluid dynamics (CFD) codes for academic research 
purposes.

2. Other tasks include generating documents such as technical reports for 
project sponsors, academic conference proceedings, and manuscripts for 
archival journal articles.

3. Secondary task is to support research of graduate students working towards 
their masters and doctoral dissertations.


Project duration: 1-2 years, with annual progress evaluation. (Any other 
required criteria for Institute postdoc applies here)


Qualifications:

1. PhD in Mechanical / Aerospace Engineering specialization in aerodynamics or 
propulsion streams with emphasis on computational fluid dynamics.

2. Doctorates in other disciplines (such as physics and applied mathematics) 
with focus on numerical methods in fluids are also welcome.

3. Expertise with FORTRAN and high performance computing is highly preferred. 
Knowledge of C++ and Python are also desired.

4. A good working knowledge of CFD, with emphasis on code development, is 
preferred.


Salary: 65-75,000 p.m. + 24% HRA


Contact:

Prof. Abhijit Gogulapati (abhijit@aero.iitb.ac.in) or
Prof. Krishnendu Sinha (krish@aero.iitb.ac.in)

We are looking for a (senior) research engineer to strengthen our R&D team and
further help develop and improve our FLACS-CFD solver. The role will include
working directly on the CFD solver, the sub-models and related research work.
In addition, you will work closely with the validation team to ensure that the
models are robust and accurate and with the application development team 
developing the pre-/post- processors. You will work in our team using Agile 
methodologies and produce clean and well-tested code. The position will be based
at our main office in Bergen, Norway.

The FLACS-CFD is the world leading software for advanced 3D safety consequence 
modelling (ventilation, dispersion, fires, and explosions) and is used in many 
industries including oil & gas, process, nuclear and increasingly renewables 
especially for hydrogen safety). The software has been developed for large 
scale industrial applications, where getting results within an acceptable time 
frame (typically hours or a few days) is just as important as getting accurate 
and robust results. 

FLACS-CFD software: https://www.gexcon.com/products-services/flacs-software/
Gexcon X-suite software: https://www.gexcon.com/products-services-category/software/   


Duties and responsibilities 

As a (senior) research engineer, you will be part of a Scrum team and work 
closely with the product owner on our RANS FLACS CFD solver and on supporting 
research topics. You will report to the senior manager software. You will have 
the following main tasks: 
- CFD solver development in FORTRAN, improving existing mathematical models and 
adding new sub-models related to turbulence, combustion, source-terms etc.. 
- Supporting research, such as literature studies and prototyping new models 
- Validation of simulation results against experimental data, supported by the 
validation team
- Close collaboration within the R&D team and with the application development 
team (both located in Norway) 
- Communication of results in the form of reports, publications and 
presentations
- Contributing to the technical documentation and third level technical support 
- Following agile working methodology

Qualifications 
- Master's or PhD degree in engineering, physics, mathematics or similar with 
good academic results
- 2 or more years work experience in a similar role (but talented candidates 
with less experience will also be considered) 
- Proficient developing mathematical models and algorithms using scientific 
programming techniques in FORTRAN, C, C++ or similar 
- Experience with gas- or multiphase- dispersion, combustion, gas explosion 
and/or structural modelling is an advantage.
- Experience with numerical modelling of fluid flow and use of CFD models is an 
advantage
- Experience with advanced statistics is an advantage

Personal qualities 
- Ability to work independently as well as with others in a geographically 
diverse teams
- Enthusiastic and pro-active
- Strong verbal and written communication skills in English
- Appreciate working in an international environment
- Able to translate complex theory into pragmatic software implementations
- An interest in new technologies such as AI, new numerical models etc. is an 
advantage 

We can offer 
- Opportunity to work on interesting and exciting software products 
- Being part of a Norwegian company with a strong global footprint 
- Working in an innovative R&D team with the ability to directly influence 
development decisions 
- Inspiring colleagues from 20 different countries and an organisation that 
highly values cooperation and knowledge sharing 
- A positive working environment to help provide a healthy work-life balance 
- Competitive conditions for all employees, including attractive salary, pension 
scheme and welfare programs 
- Opportunity to be involved in the green energy transition. 

Gexcon is a global knowledge and technology leader in dispersion, fire and 
explosion safety and risk management. We assist our clients in identifying their 
 hazards, understand their risk and improve their safety performance. Our 
experience arises from detailed knowledge of explosion phenomena built through 
years of extensive research, performing safety assessment, accident 
investigations and physical testing at our dedicated large-scale facilities. 
Gexcon develops, maintains and uses FLACS®, the world’s leading simulator for 
dispersion, fire and explosion. 

Headquartered in Bergen, Norway, Gexcon has offices in Trondheim, Australia, 
China, France, India (Pune and Mumbai), Indonesia, the Netherlands, Sweden, 
the United Arab Emirates, the UK, Russia and USA (Houston, Bethesda, and 
Boston). Gexcon AS is a fully owned subsidiary of NORCE Norwegian Research 
Centre.

Ansys is the global leader in engineering simulation, helping the world's most 
innovative companies deliver radically better products to their customers. By 
offering the best and broadest portfolio of engineering simulation software, 
Ansys helps companies solve the most complex design challenges and engineer 
products limited only by imagination.


SUMMARY

The R&D Engineer II (Software Developer) will be part of a team responsible for 
advancing Ansys Computational Fluid Dynamics (CFD) software, with emphasis on 
state-of-the-art technology for the simulation of high-speed flows ranging from 
transonic to supersonic and through to hypersonic. The Software Developer II 
will work on both enhancing numerical solution methods as well as extending 
physical models required for the robust, efficient, and accurate simulation of 
such flows. The Software Developer II will work closely with other team members 
to ensure the capabilities meet Ansys strategic needs and customer 
expectations.


RESPONSIBILITIES

The position involves developing, implementing, and maintaining functionality 
related to the Ansys CFD solver’s high-speed and hypersonic flow modeling 
capabilities. Areas of work include:

Advanced numerical solution methods and algorithms appropriate for compressible 
flows
Physical models required for high-speed and hypersonic flow applications
Code design and implementation appropriate for commercial software
Maintenance of existing software features and derivation of appropriate tests 
for new features
High-level support and instruction to product support and development staff

The developer will interact with a dynamic team of engineers, programmers, and 
scientists, in a fast-paced development environment. The incumbent is expected 
to maintain a level of technical excellence in the field of CFD, high speed and 
hypersonic flow CFD through the evaluation of current literature, participation 
in technical conferences, publications, and interaction with colleagues in the 
field.


MINIMUM QUALIFICATIONS

-Ph.D. in Mechanical or Aerospace Engineering, or equivalent
-Experience in CFD software development
-Excellent and demonstrated programming skills in at least one scientific 
programming language, such as Fortran, C and C++
-Excellent communication and interpersonal skills, with the ability to work 
collaboratively in a geographically distributed organization.
-Strong analytical skills and outstanding academic achievement
 

PREFERRED QUALIFICATIONS

-Experience is CFD software development for modeling compressible and high-
speed flows
-Knowledge of C/C++ programming language
-Experience with parallel programming protocols, e.g. openMP
-Familiarity with commercial CFD software and meshing tools
-Experience with performing CFD simulations of industrial size cases
 

CULTURE AND VALUES

Culture and values are incredibly important to Ansys. They inform us of who we 
are, of how we act. Values aren't posters hanging on a wall or about trite or 
glib slogans. They aren't about rules and regulations. They can't just be 
handed down the organization. They are shared beliefs – guideposts that we all 
follow when we're facing a challenge or a decision. Our values tell us how we 
live our lives; how we approach our jobs. Our values are crucial for fostering 
a culture of winning for our company:

Customer focus
-Results and Accountability
-Innovation
-Transparency and Integrity
-Mastery
-Inclusiveness
-Sense of urgency
-Collaboration and Teamwork
 
WORKING AT ANSYS
At Ansys, you will find yourself among the sharpest minds and most visionary of 
leaders, collectively aiming to change the world with innovative technology and 
remarkable solutions.  With the prestigious reputation in servicing well-known, 
world-class companies, standards at Ansys are high, met by those willing to 
rise to the occasion and meet those challenges head-on.  Because at Ansys, it’s 
about the learning, the discovery and the collaboration.  It’s about the 
“what’s next” as much as the “mission accomplished”.  It’s about the melding of 
disciplined intellect with strategic direction and results that have, can and 
will impact real people in real ways, forged within a working environment built 
on respect, autonomy and ethics.
 
At Ansys, you will find yourself among those eager to drive the world towards 
the next best thing with hands planted firmly on the wheel.
Our team is passionate about pushing the limits of world-class simulation 
technology so our customers can turn their design concepts into successful, 
innovative products faster and at lower cost.  As a measure of our success in 
attaining these goals, Ansys has been recognized as one of the world's most 
innovative companies by prestigious publications such as Bloomberg Businessweek 
and FORTUNE magazines.
 
Ansys is an S&P 500 company and a component of the NASDAQ-100.
 
For more information, please visit us at www.ansys.com
 
Ansys is an Equal Opportunity Employer. All qualified applicants will receive 
consideration for employment without regard to race, color, religion, sex, 
sexual orientation, gender identity, national origin, disability, veteran 
status, and other protected characteristics.
 
Ansys does not accept unsolicited referrals for vacancies, and any unsolicited 
referral will become the property of Ansys.  Upon hire, no fee will be owed to 
the agency, person, or entity.

> We are looking for a Post-Doc fellow to perform numerical simulations of the flow past a hyperloop capsule. 
The candidate will first address canonical configurations, i.e. axisymmetric bluff bodies in free flow and in a tube, in the incompressible and compressible regimes, from low to moderate Reynolds numbers. 
These flows can be tackled using DNS, LES and DES (hybrid), hence the candidate should be familiar with these methods. 
The work will then focus on the analysis (e.g. correlations, spectral analysis) of the flow to unravel the physics that drive wake instabilities and the resulting fluctuating loads on the capsule. 
On this basis, control strategies for drag reduction/fluctuating loads mitigation will be proposed and tested numerically. 
Finally, the candidate will participate in a companion experimental campaign.

> This project is conducted within a collaboration between ISAE-Supaero, IMFT and Hyperloop TT in Toulouse, France.

> The candidate should hold a PhD degree in fluid mechanics (or equivalent) and should be familiar with numerical methods including meshing (ICEM), DNS and LES (commercial and in-house codes), as well as post-processing tools for physical analysis. 
Knowledge in experimental techniques is a plus. 
EU citizens only.

A post-doctoral position in Computational Fluid Dynamics is available at the 
University of Louvain (UCLouvain) in Belgium. The topic concerns turbulent 
convection at open-top reservoirs with phase change (evaporation across the 
free surface plus boiling). Relevant applications include thermal power plants, refrigeration systems, water and fuel tanks, boilers, spent fuel pools of nuclear power stations and others.

The specific objectives of the project are the following.
1)  Development of appropriate models that describe all relevant hydrodynamic and transport phenomena occurring below and above the free surface.
2)  Development of algorithms and numerical simulations, via high-performance computing.
3)  Calculation of phase-change rates for a variety of configurations.

Particular emphasis will be given in the modelling and simulation of:  
•  turbulent convection at high Rayleigh numbers,
•  evaporation across the free surface,
•  nucleation and boiling at solid boundaries,
•  descent of the free surface. 

The starting date can be as early as November 1 2020. The initial duration of the appointment is for 12 months,  renewable twice for a period of 12 months each. Therefore, the overall duration can be up to 36 months. 

The postdoctoral fellow will join the Multi-phase and Reacting Flows group of 
the University of Louvain. Information about our group's activities is available 
on our website, https://sites.google.com/site/mvpapalexandris/

The postdoctoral fellowship includes the fellow’s salary, full insurance and 
health benefits, public-transportation cost and coverage of expenses for 
participation in conferences & workshops.

Required qualifications and skills:
- a PhD degree in the thematic area of modelling and simulation of turbulent 
flows. Background and expertise in two-phase flows is highly desirable.
- good programming skills (in C/C++ or Fortran),
- strong mathematical background,
- ability to efficiently communicate, read and write in English.

Interested applicants are invited to submit: 
i)    detailed CV, 
ii)   transcripts of academic records (grades),
iii)  a statement of research interests, and 
iv)   names of 2 references to Prof. M. Papalexandris, miltiadis.papalexandris@uclouvain.be

You must apply via the official website before 31st October 2020:

https://www.chalmers.se/en/about-chalmers/Working-at-
Chalmers/Vacancies/Pages/default.aspx?rmpage=job&rmjob=8848


Information about the research
The project will be conducted at the division of fluid dynamics of the department 
of Mechanics and Maritime Sciences. The research at the Division covers turbulent 
flow (both compressible and incompressible), aero-acoustics and turbomachines. 
Information about the researchOur tools include both computations and experiments. 
The research covers a wide range of topics. In some research projects the smallest 
turbulent scales are studied whereas in others the function of a complete gas 
turbine is analyzed and modelled.

Our applied research is carried out in close cooperation with industry, both in 
national projects and in EU projects. Vehicles (cars, trucks, busses and trains), 
airplanes, gas turbines, water and wind turbines are important applications. The 
Division of Fluid Dynamics is part of Chalmers Sustainable Transport Initiative, 
Chalmers eScience Initiative and Chalmers Energy Initiative.

A large part of our teaching activity is carried out within our International 
Master Program in Applied Mechanics. In this program we offer courses covering a 
wide range of courses, including turbulence modelling, experimental fluid 
dynamics, CFD, heat transfer, turbomachinery and gas turbine technology.

Main responsibilities
Your major responsibilities as a PhD student are to pursue your own doctoral 
studies. You are expected to develop your own scientific concepts and communicate 
the results of your research verbally and in writing. Your research will be 
supervised by well-reputed senior researchers at the involved departments. PhD 
studies also includes a number of doctoral courses, reviewing literature, 
designing research studies, interacting with industrial companies, collecting and 
analysing empirical data, and reporting research results.

The position generally also includes teaching on Chalmers' undergraduate level or 
performing other duties corresponding to up to 10-15 percent of working hours.

Information about the project
Current urban design fairly addresses noise and wind comfort but do not consider 
thermal comfort and impact of green areas to reduce local temperatures and improve 
air quality. This PhD project aims to investigate future urban design to achieve 
thermal and air quality comfort for the majority of urban residents. The final 
results will provide new guidelines for sustainable urban design and evaluate the 
best strategies to enhance urban comfort. We will employ a state of the art 
digital tool based on Computational Fluid Dynamics (CFD) with unique features in 
terms of spatial resolution and computational speed.

The specific objectives of the project are i) Upgrading the existing tool with 
models for heat and pollution transport including the effects of green areas. ii) 
Developing a physical understanding of the interplay between wind flow patterns 
and human comfort in urban areas. iii) Applying the digital tool into an urban 
design study in Gothenburg, to identify critical locations of enhanced (or lower) 
urban comfort. iv) Providing specific guidelines and test different strategies 
(use of vegetation and green roofs, cool roofs, traffic restriction plans).

The research plan will be developed in close collaboration with the division of 
Building Physics at Chalmers and the Fraunhofer-Chalmers Centre for applied 
mathematics.

Contract terms
Full-time temporary employment. The position is limited to a maximum of 4.5 years.

Qualifications
To qualify for this position, you need a master's level degree corresponding to at 
least 240 higher education credits in Mechanical Eng., Civil Eng., Building 
physics, Chemical Eng., Physics, Math. Eng., Aeronautics or any corresponding MSc. 
Basic knowledge of fluid mechanics and programming is required. Experience with 
CFD simulations of turbulent flows using in-house or commercial softwares will be 
considered meritorious.

The position requires sound verbal and written communication skills in English. 
Swedish is not a requirement but if you have an interest in learning Swedish, 
Chalmers offers Swedish courses.

Chalmers continuously strives to be an attractive employer. Equality and diversity 
are substantial foundations in all activities at Chalmers.

Our offer to you
Chalmers offers a cultivating and inspiring working environment in the dynamic 
city of Gothenburg. 
Read more about working at Chalmers and our benefits for employees.

Application procedure
The application should be marked with Ref 20200429 and written in English. The 
application should be sent electronically and be attached as pdf-files, as below:

CV: (Please name the document: CV, Family name, Ref. number)
• CV
• Other, for example previous employments or leadership qualifications and 
positions of trust.
• Two references that we can contact.

Personal letter: (Please name the document as: Personal letter, Family name, Ref. 
number)
1-3 pages where you:
• Introduce yourself
• Describe your previous experience of relevance for the position (e.g. education, 
thesis work and, if applicable, any other research activities)
• Describe your future goals and future research focus

Other documents:
• Copies of bachelor and/or master’s thesis.
• Attested copies and transcripts of completed education, grades and other 
certificates, e.g. TOEFL test results.

Please use the button at the foot of the page to reach the application form. The 
files may be compressed (zipped).

Application deadline: 31 October, 2020

For questions, please contact:
Associate professor Gaetano Sardina, Fluid Dynamics
sardina@chalmers.se, +46317721417

Overview:

The work in the Doubrovinski laboratory is focused on uncovering the physical 
aspects of animal development. Using fruit fly (Drosophila melanogaster) 
embryo as an experimental model, we have developed a tool box of experimental 
techniques that allow measuring rheological properties of embryonic tissues 
directly in a living developing fly embryo. Our work has revealed that the 
embryonic cell consists of viscous interior (cytoplasm) enclosed by a highly 
elastic cell surface (cellular cortex). Careful quantitative measurements 
have allowed us to determine material parameters characterizing those 
cellular compartments. Currently, our research is focused on utilizing the 
information acquired in quantitative in vivo measurements of tissue rheology 
to understand endogenous tissue movements that shape an embryo during 
development.

Project description:

We are looking for an expert in computational fluid dynamics to model tissue 
dynamics during embryonic development. The project will involve developing 
simulations of embryonic tissue dynamics occurring during the development of 
a fruit fly embryo. The models developed will be rigorously tested using a 
variety of biological experiments (fly genetics, microscopy, laser ablation, 
etc.) so we are looking for someone who is eager to collaborate with 
experimentalists in the lab. This project is a continuation of an ongoing 
collaboration with the Mandadapu group at UC Berkeley, and the work will be 
co-advised by Kranthi Mandadapu.

Requirements:

We require some familiarity with computational fluid dynamics. Expertise in 
fluid-structure interactions, finite element analysis, and experience with 
parallelization (in particular GPU) is desirable (though none of the above is 
an absolute requirement).

Am Institut für Mechanische Verfahrenstechnik und Mechanik (MVM) sowie am Institut für Angewandte und Numerische Mathematik (IANM) suchen wir zum nächstmöglichen Zeitpunkt eine/n

Wissenschaftliche/n Mitarbeiter/in

für unser Team Lattice Boltzmann Research Group. Im Rahmen eines Forschungsprojektes zur Simulation von Strömungen ist eine Vollzeitstelle befristet zu besetzen. Nach Einarbeitung wird nach TV-L, E 13 vergütet. Es besteht die Möglichkeit zur Promotion.

Sie verfügen über einen überdurchschnittlichen Hochschulabschluss (Diplom (Uni)/Master) im Bereich Ingenieurwesen, Mathematik, Physik oder Informatik. Neben Freude an der wissenschaftlichen Problemanalyse sowie an mathematischen und/oder verfahrenstechnischen Fragestellungen erwarten wir von Ihnen gute Programmierkenntnisse, Initiative, Ideenreichtum und gute Kommunikationsfähigkeiten in Wort und Schrift der deutschen und englischen Sprache. Auf Arbeit im Team wird großen Wert gelegt. 

Das Karlsruher Institut für Technologie ist bestrebt, den Anteil an Frauen zu erhöhen und begrüßt deshalb besonders die Bewerbung von Frauen. Schwerbehinderte Bewerber/innen werden bei gleicher Eignung bevorzugt berücksichtigt.

Bewerbungen mit den üblichen Unterlagen richten Sie bitte vorzugsweise elektronisch in einer pdf-Datei an

E-Mail: mathias.krause@kit.edu