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How to get the PLOT3D functions in AcuFieldView for post processing????

Altair Forum User

Dear Altair-Engineering-Team,

I am writing my bachelor thesis in the area of fluid mechanics. Here, I examine various models with the help of AcuConsole (AcuSolve). To evaluate my calculations, I'm using the additional software 'AcuFieldView'.

My problem:

I would like to use the 'PLOT3D' functions in AcuFieldview but I don't know how to get them. I read already the reference guide and there is mentioned that you can write own functions and register them afterwards but that was too superficial for me.

My question:

Do you have already created files for these 'User Functions' (PLOT3D) and can you tell me in brief how to register these in AcuFieldView. Maybe a short tutorial which explains step by step to do that?

Thank you very much

Ayrix

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ydigit

AcuFieldView is special version of FieldView that is meant to read only AcuSolve results. Hence you can read only .Log files from AcuSolve or convert AcuSolve results to .fv format using AcuTrans.

What function are you looking for ? If you could describe that, it might be possible to help you with a .frm file.

Altair Forum User

thank you for your reply...

i need to visualize (in acufieldview) the following functions

- mach number

- density

- pressure coefficient cp

- lift coefficient ca

- aerodynamic drag coefficient cd/cw

- volume fraction

thanks

ydigit

Density should be generally visible as a scalar in AcuFieldView.

For Lift and Drag I would recommend you to create a case in Virtual Wind Tunnel and check out Lift and Drag Coefficient files in the run directory.

---------------------

Cp would be similar to :

formula_restart_version: 1
vwtVel
50.00000
vwtRho
1.22500
vwtCp
('pressure'-0)/(0.5*'vwtRho'*('velocity_magnitude'+'vwtVel')^2)

--------------------------------

Mach number

************* MACH NUMBER - AIR ******************************
'temperature'
speed_of_sound
20.05*sqrt('temperature')
mach_number
'velocity-magnitude'/'speed_of_sound'
running_ave_speed_of_sound
20.05*sqrt('running_ave_temperature')
running_ave_mach_number
'running_ave_velocity-magnitude'/'running_ave_speed_of_sound'
********************************************************************

ydigit

I am not sure what you meant by volume fraction.

AcuSolve is single phase solver. Not sure if volume fraction makes sense for single phase flows.

Altair Forum User

density is not availible as a scalar function. because of that, i can't write functions which contains the density in the equation.

i don't think acusolve single phase solver. altair has tutorials for multiple phase problems on their website.

i don't know to use wind tunnel. do you know where i can get tutorials therefor?

thanks

cfdguru

Density is available if you have DERIVED_QUANTITY _OUTPUT turned on in the AcuSolve input file.

ydigit

The tutorials you might have seen are related to multispecies using scalar transport equation.

For VWT Tutorial, Help manual of has detailed information.

Additionally this video tutorial : http://training.altairuniversity.com/analysis/cfd/virtual-wind-tunnel/virtual-wind-tunnel-analysis-of-a-student-race-car/

Altair Forum User

as you can see at the pic below, you can use the mach number in acufieldview.

my question is, how can i make that visible? because this options are not avalible in my version (13.2)

<?xml version="1.0" encoding="UTF-8"?>

ydigit

It is possible to create a formula for Mach number.

Please refer to page 90 of FVReference_Manual.pdf in your AcuSolve/FV installation.

'How do I Create a new formula?'

Altair Forum User

thank you sir.

i've got it!!!