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Forum: Main CFD Forum Today, 20:34
Replies: 10
Views: 242
Posted By pfguo
Thank you for your suggestion. I have been...

Thank you for your suggestion.

I have been reading the content you mentioned in the book you recommended these past few days.

Basically, I can understand the proofs in the book, but it...
Forum: Main CFD Forum Today, 20:03
Replies: 3
Views: 78
Posted By wkernkamp
Your result is not wildly different. Which holes...

Your result is not wildly different. Which holes are the last four holes? Near the end or near the beginning?


You are basically validating a discharge coefficient for your holes and expect...
Forum: Main CFD Forum Today, 16:16
Replies: 0
Views: 41
Posted By praveenu
Why is U(1,1) changing in the middle of the loop??? (Fortran)

Hi all, I have no idea whats going on with this code. The value of u(1,1) which is initialized as 1.0 is changing in the middle of the loop even though the loop indices go from 2 to n-1. i and j...
Forum: Main CFD Forum Today, 05:29
Replies: 0
Views: 34
Posted By justinab1
Ansys Turbogrid Negative Volume Error

Hi. I'm currently new to using ANSYS software, and I am having trouble creating a mesh for centrifugal pump geometry. I designed the impeller using Vista CPD and design modeler and would like to...
Forum: Main CFD Forum Today, 02:53
Replies: 0
Views: 70
Posted By toanhkhoas1212
Simulation Issues with Stirred Tank Using Rushton Turbine

Hello everyone,

I am currently working on a simulation of a stirred tank using a Rushton turbine in ANSYS Fluent. The tank contains glycerin (with a density of 1260 kg/m^3 and viscosity of 600 cP)...
Forum: Main CFD Forum Yesterday, 19:07
Replies: 3
Views: 78
Posted By AbhisheK_
The pressure i am expecting is 32Pa with an...

The pressure i am expecting is 32Pa with an average velocity of 6.5 m/s (but i am getting 36Pa (higher drop) and 5 m/s velocity (lower velocity). I get correct velocity vs pressure for last 4 holes....
Forum: Main CFD Forum Yesterday, 18:33
Replies: 3
Views: 78
Posted By wkernkamp
It could be that the effect you are seeing is...

It could be that the effect you are seeing is physical: i.e. an actual pipe would show the same. The flow condition at each hole is different because the flow velocity in front of a hole is higher...
Forum: Main CFD Forum Yesterday, 16:02
Replies: 3
Views: 78
Posted By AbhisheK_
turbulent pipe flow with holes - airflow and pressure drop study

99782

99783

99784

99785


Hello everyone,
Forum: Main CFD Forum Yesterday, 03:09
Replies: 10
Views: 242
Posted By @ss
How the lapacian eqation for mesh motion is solved in openfoam

Hello,
I am working on the FSI problem for vortex-induced vibration. The ALE approach has been used to solve coupling motion for fluid and solid. The fluid equation is discretized based on FVM,...
Forum: Main CFD Forum May 3, 2024, 03:42
Replies: 0
Views: 62
Posted By homan95
Certificate

Hi all,

I would like to ask if anyone knows any good professional certification programs for CFD?

Thank you.

Best regards,
Kenneth
Forum: Main CFD Forum May 1, 2024, 23:19
Replies: 0
Views: 70
Posted By joewindham
Compressibility effect for cubic nonlinear eddy viscosity model

Hi guys,

I want to parameterize the model coefficients of the cubic nonlinear eddy viscosity model to account for the compressibility effect, but i'm totally lost.

Can you suggest me some steps...
Forum: Main CFD Forum May 1, 2024, 11:34
Replies: 10
Views: 242
Posted By FMDenaro
Follow carefully the derivation of Chorin

Follow carefully the derivation of Chorin
Forum: Main CFD Forum May 1, 2024, 10:53
Replies: 0
Views: 59
Posted By Fraxiel
Negative cell volume [Mesh motion]

I'm currently conducting a CFD analysis of a pusher propeller on a medium-sized aircraft. To study the increase of the drag on the entire aircraft (I have done a separate analysis of the aircraft...
Forum: Main CFD Forum May 1, 2024, 05:23
Replies: 38
Views: 23,632
Posted By dmitr
Hello, can you please send me to my email...

Hello, can you please send me to my email (dima.onega2015@gmail.com) with the coordinates for the profiles du91-w2-250, du 93 w-210 and naca 64-618?
Forum: Main CFD Forum April 30, 2024, 23:03
Replies: 10
Views: 242
Posted By pfguo
Thank you for recommending the book. I've been...

Thank you for recommending the book. I've been reading it for a while, but I'm still unclear about where my problem lies. Nevertheless, I sincerely appreciate your attention.
Forum: Main CFD Forum April 30, 2024, 23:01
Replies: 10
Views: 242
Posted By pfguo
Currently, the part where I'm stuck doesn't...

Currently, the part where I'm stuck doesn't involve Gauss's theorem, and I don't think my problem lies in the use of Leibniz's theorem either. I strongly feel that I may have misunderstood the...
Forum: Main CFD Forum April 30, 2024, 18:23
Replies: 0
Views: 67
Posted By kate_h
Using DiPhyx

Hi

I just started using DiPhyx (https://diphyx.com) to run an OpenFoam case. I followed their manual in here: ...
Forum: Main CFD Forum April 30, 2024, 09:55
Replies: 10
Views: 242
Posted By FMDenaro
Just follow the idea of the derivation of the...

Just follow the idea of the derivation of the Reynolds transport theorem.
You can read a rigorous description in the textbook of Chorin & Marsden.
Forum: Main CFD Forum April 30, 2024, 09:48
Replies: 10
Views: 242
Posted By agd
Are you sure you aren't applying Liebniz's...

Are you sure you aren't applying Liebniz's theorem twice? Consider mass conservation for a fluid element - mass conservation in a Lagrangian sense is simply the time derivative of the integral of...
Forum: Main CFD Forum April 30, 2024, 08:15
Replies: 0
Views: 72
Posted By mahir
frame motion rotational origin

hello everone. i need to ask that i am working on a heat exchanger with an stirrer. i modeled that impeller as frame motion. i am curios about whether i should specify rotational origin as x, y, z...
Forum: Main CFD Forum April 30, 2024, 07:07
Replies: 0
Views: 72
Posted By Sumeet Anand
melting and solidification of phase change materials periodically with time

Hello everyone,
I am simulating the melting and solidification behavior of phase change material (PCM) in the heat pipe for subsequent time cycles. Cold fluid flows in the inner pipe while the PCM...
Forum: Main CFD Forum April 30, 2024, 04:56
Replies: 10
Views: 242
Posted By pfguo
I really appreciate for your attention. ...

I really appreciate for your attention.

Actually, I got stuck even before applying the divergence theorem to the surface integral term.

I got stuck on the term involving the derivative of the...
Forum: Main CFD Forum April 30, 2024, 04:55
Replies: 0
Views: 50
Posted By Fluidalessio
How to insert tables (P,T) for properties on STARCCM+

Hi guys, I am working with supercritical water and would like to include the pressure and temperature dependency in the properties via the tables that STARCCM+ provides. I have never done this and...
Forum: Main CFD Forum April 29, 2024, 16:52
Replies: 3
Views: 85
Posted By FMDenaro
This picture means nothing. You need to check at...

This picture means nothing. You need to check at the final steady state. Use the quantitative comparison, velocity profiles, vorticity and so on.
Forum: Main CFD Forum April 29, 2024, 16:03
Replies: 3
Views: 85
Posted By praveenu
Hi, the Re = 100, I've attached the tecplot file...

Hi, the Re = 100, I've attached the tecplot file of the last time step.
Showing results 1 to 25 of 39
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