how to map inlet profile to internal fields

wolfindark · May 5, 2020, 10:35

Dear Foamers,

Is it possible to map the inlet profile of any field to the internal field?
For example I want to have same profile in the internal mesh regions with the inlet patch.

How can be done? is there any tutorial?

thanks

geth03 · May 29, 2020, 04:52

do i understand correctly that you don't want that your flow change within your domain? so lets say you give an inlet flow distribution and your flow doesn't change within a pipe or so?

wolfindark · May 29, 2020, 08:18

Quote:

Originally Posted by geth03

do i understand correctly that you don't want that your flow change within your domain? so lets say you give an inlet flow distribution and your flow doesn't change within a pipe or so?

No It will change. inlet profile will be an initial condition for internal field, i.e, internalField

HPE · May 29, 2020, 19:29

Hi,

There is no direct utility to perform this, but you can use a coded function object or other coded utilities.

On the other hand, if you would like to map velocity - you would need to map it as a body force, and/or into the pressure-velocity coupling algorithm (it is doable, and has been done extensively, e.g. actuator line modelling or Kim et al. 2013's synthetic turbulent inlet flow mapping for LES simulations etc)

I'm extremely tired, so can't elaborate further, but can you give more details on what you want to accomplish? what type of field you would like to map (e.g. temperature? velocity?), or for compressible/incompressible flows etc?

wolfindark · May 29, 2020, 20:07

Thank you very much HPE.

I want to map U, k, omega, and T.
Solver is chtMultiRegionFoam. Compressible solver.

HPE · May 31, 2020, 16:28

Hi,

- I think you may need to modify the relevant codes, I'm afraid. There is no off-the-shelf utility for doing such task, afaik.
- Would you please let us know if there is such a utility comes your way?

May 5, 2020, 10:35	how to map inlet profile to internal fields	#1
wolfindark Member Neilson Whit Join Date: Aug 2011 Posts: 74 Rep Power: 15	Dear Foamers, Is it possible to map the inlet profile of any field to the internal field? For example I want to have same profile in the internal mesh regions with the inlet patch. How can be done? is there any tutorial? thanks

May 29, 2020, 19:29		#4
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 931 Rep Power: 13	Hi, There is no direct utility to perform this, but you can use a coded function object or other coded utilities. On the other hand, if you would like to map velocity - you would need to map it as a body force, and/or into the pressure-velocity coupling algorithm (it is doable, and has been done extensively, e.g. actuator line modelling or Kim et al. 2013's synthetic turbulent inlet flow mapping for LES simulations etc) I'm extremely tired, so can't elaborate further, but can you give more details on what you want to accomplish? what type of field you would like to map (e.g. temperature? velocity?), or for compressible/incompressible flows etc? __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

May 31, 2020, 16:28		#6
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 931 Rep Power: 13	Hi, - I think you may need to modify the relevant codes, I'm afraid. There is no off-the-shelf utility for doing such task, afaik. - Would you please let us know if there is such a utility comes your way? __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

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May 29, 2020, 04:52		#2
geth03 Senior Member Join Date: Dec 2019 Location: Cologne, Germany Posts: 367 Rep Power: 8	do i understand correctly that you don't want that your flow change within your domain? so lets say you give an inlet flow distribution and your flow doesn't change within a pipe or so?

May 29, 2020, 20:07		#5
wolfindark Member Neilson Whit Join Date: Aug 2011 Posts: 74 Rep Power: 15	Thank you very much HPE. I want to map U, k, omega, and T. Solver is chtMultiRegionFoam. Compressible solver.