Topics

16

Fluent / How can I access Compressive VOF scheme in Fluent 12?

« on: May 13, 2012, 10:52:30 AM »

How can I access Compressive VOF scheme in Fluent 12?

17

CFX / How do I setup a simulation in CFX 10.0 with R134a?

« on: May 13, 2012, 10:49:32 AM »

How do I setup a simulation in CFX 10.0 with R134a?

18

CFX / Error: mpirun_mpid version mismatch

« on: May 13, 2012, 10:46:41 AM »

When trying to launch CFX 14 in parallel you get the following error: Error: mpirun_mpid version mismatch.

Please help.

19

Fluent / How to specify velocity-inlet to interior faces types?

« on: May 12, 2012, 02:48:33 PM »

I want to specify velocity inlet to interior face zone in the mesh. I have a cylinder completely inside the a box. The inside of the cylinder is meshed and have cell zone fluid-1, and outside of the cylinder is meshed with cell zone fluid-2. The inlet and outlet of the pipe is an interior type and are named interior-5, and interior-6, respectively. There is node-connectivity between fluid-1 and fluid-2 at all the boundary zones of the pipe.

I know the velocity of the fluid entering. Also, the fluid of the pipe does not mix with the fluid outside at the outlet of the pipe. How to specify velocity inlet to the pipe and make the fluid inside the pipe exit the domain at the outlet?

20

Meshing / How to create a helical pipe/coil in Gambit?

« on: May 12, 2012, 01:56:03 PM »

I want to make helical pipe/coil using Gambit. I dont see any function for making helical coil in it. Can any one tell me how it can be done?

Thanks.

21

Fluent / What are the flow iterations per radiation iteration?

« on: May 12, 2012, 12:56:38 PM »

I am using radiation model in Fluent. I cant understand what the flow iteration per radiation iteration mean?
Can anyone explain.

22

Fluent / How big should be the domain for an automotive external aerodynamics calculation

« on: May 12, 2012, 12:12:40 PM »

How big should I make the domain for an automotive external aerodynamics calculation? I want to replicate wind tunnel test.

23

Fluent / Mass and Energy imbalance problem in Fluent simulation with DPM

« on: May 11, 2012, 11:04:00 AM »

Hello,

I am running multiphase simulation with DPM tracked as Lagrangian. In the simulation, heat and mass transfer from discrete phase to the continuous phase takes place. I can not get correct mass and energy balance in the Fluxe report. Can anyone help me?

Thanks.

24

Fluent / How can I get particles mean diameters at each cell?

« on: April 25, 2012, 10:08:30 AM »

I am running a Fluent CFD simulation with lagrangian discrete phase particles of varying sizes in a spray. I want to calculate mean particle size/diameter in each cell. Can it be done in Fluent?

Thanks.

25

Fluent / Compiling and Loading FLUENT 14 64-bit UDFs using "FREE" Microsoft Visual Studio

« on: April 10, 2012, 11:17:49 AM »

Just wanted to share guidelines for compiling and loading FLUENT 14 64-bit UDFs using the "FREE" Microsoft Visual Studio 2010 32-bit Express Edition and the 7.1 SDK

See the attached PDf file.

26

Fluent / Convergence of FLUENT calculations involving combustion and radiation

« on: February 13, 2012, 08:51:16 PM »

Hi,

How can I improve the convergence of FLUENT calculations involving combustion and radiation?

Thanks.

27

Fluent / Error: > (greater-than): invalid argument [2]: wrong type [not a number]

« on: February 12, 2012, 12:36:32 PM »

How do I resolve the following error: Error: > (greater-than): invalid argument [2]: wrong type [not a number] Error Object: nan in Fluent?

Thank you.

28

Fluent / How can I compute gradient of VOF simulation

« on: February 08, 2012, 10:17:44 AM »

Hi,

I am carrying out VOF simulation. I want to calculate the gradient VOF. Can any one suggest me how to do this?

Thanks.

29

Fluent / Conjugate heat transfer problem in Fluent 12. Energy residuals are high.

« on: February 06, 2012, 06:34:36 PM »

Hello,

I have a conjugate heat transfer problem in Fluent 12.0. The energy residuals do not converge. What could be the cause and how do I get it converged?

Thank you.

30

Fluent / What is Swirl fraction in the hollow cone injection in Fluent?

« on: February 04, 2012, 06:32:06 PM »

Hi,

How does the swirl fraction impact the hollow cone spray and how do I define it? Does anyone know?

Thank you.