Hello everyone,
I'm having a problem with a value (Cp: specific heat) that I want to set as default in all my TCAE projects. For that I modified the file TCAE-23.03v1/TCAE/etc/CAEProcessorDefaults.tcae by adding
Cp "1800_J/(kg.K)"
When I create a new TCAE project, the value of Cp is well defined at 1800 J/kg/K. However, it seems that when through the GUI I set the value to 0

and that I save, restore then check, no error is reported and I can run the simulation without any problem. That's when I looked at the TCAEproject/setup file and I was surprised to see that the heat capacity value was changed to
Cp "1004_J/(kg.K)"
This value corresponds to the air, originally set by default in the CAEProcessorDefaults.tcae configuration file.

So why my value that I set to 1800 J/kg/K was not returned ?

Hello,

I would like to present my current project for further experiments with TCAE and TOPT.

It is a parametric axial fan created in the OpenVSP free parametric CAD primarily used for aviation purposes. It allows controlling the geometry with pre-programmed parameters and their further linking. It can also be controlled by external scripts. All these functions are perfect premises for geometry optimization with our TOPT module.

This model is designed for catalogue-like making of fans for defined conditions. You create a spectrum of axial fan variation and then choose which one suits the best (with consideration on parameters like pressure drop or aerodynamic torque and then fan efficiency calculated from them).

Simplified model will be used in the upcoming TCAE tutorial, where only a few basic blade parameters will be modified. Its main purpose there will be demonstration of the TOPT capabilities and their potential use in industrial design.

Hello

could you help me, I am trying to run a simulation in parallel but the code for the "Interfoam" solver does not run, the "decomposePar" command works correctly. I attach screenshots in the following link (https://drive.google.com/drive/folders/1y6dm_L3zLdJ-O3ajiX3d1T9r6SUTQiNo?usp=share_link)

Best regards

greetning

i have installed Cygwin in my computer to compile fortran code and it work fine. i want to first know if it is possible to run Openfoeam with Cygwin as it is a linux interface on window system and if it is possible, help to how we can do it.

Hello everyone,

I have seen that it exists a new option called --apply-diff for the CAEProcessor command. The help just said that it "changes the project setting by specifying the path to the text file with TCAE configuration keywords, which are to be changed." And the example give us only

CAEProcessor --project fan --apply-diff changes.txt --save-as fan-2

But I wonder what is the information and format of this changes.txt file?

Hello everyone,

I have just installed the new version 23.03v1.

I wonder in which cases it is necessary / recommanded / relevant to enable "Use external geometries / meshes (file will not be imported into the project)" in TMESH in this new version 23.03v1 ? I have noticed that in TCAE/tutorials repertory, it is enable only when TOPT is used.

In my case I have got an already meshed geometries from FLUENT but I have seen that it is possible to both enable/disable this feature. But I have encountered some issues when it is disabled. More specificaly, sometimes, when I restore the project, one interface (inlet/outletInterface) disappear.

What do you recommend?

This is a practice exercise for one of my subjects. Currently I want to simulate this setting (automatic chicken feeder). My product frequently breaks at the arrow position. The material is PP (Polypropylene) plastic (the pipe part is steel). I want to simulate the broken position and the direction of improvement? Anyone who has a way to handle this can help me more (where should I put contacts, ..)? Thank you

Dear Team, 

I am trying to run a simulation of the FDA Benchmark Blood Pump case with TCAE. I am using my meshes that I have generated by myself (not via TMESH). 

The project case setup seems to be fine, and I get the message "Project Setup OK" upon checking. However, when I start the TCFD run, I get the following error message after a while - 

"--> FOAM FATAL IO ERROR:

Cannot open include file "C:/Users/KaranBaliga/Desktop/TCAE/GridPro Blood Pump/Fluent_Grids_GridPro/GridPro_Blood_Pump/simulationRun1/TCFD/transient/1_1/system/hi.fun" while reading dictionary "C:/Users/KaranBaliga/Desktop/TCAE/GridPro Blood Pump/Fluent_Grids_GridPro/GridPro_Blood_Pump/simulationRun1/TCFD/transient/1_1/system/controlDict/functions"

file: C:/Users/KaranBaliga/Desktop/TCAE/GridPro Blood Pump/Fluent_Grids_GridPro/GridPro_Blood_Pump/simulationRun1/TCFD/transient/1_1/system/controlDict at line 78.

From function static bool Foam::functionEntries::includeEntry::execute(Foam::dictionary&, Foam::Istream&)

in file db/dictionary/functionEntries/includeEntry/includeEntry.C at line 169.

FOAM exiting"

I do not know why this error occurs. Can you please help me out?

If required I can attach the case files as well. 

Thanks and Regards,

Karan H Baliga,

GridPro. 

Hi everyone,

We are looking to perform CFD calculations with OpenFoam of a large sea area (volume of around 1km x 1km x 200m) around a single offshore structure or ship (estimated size of around 100m – 200m, with small elements of around 0.3m).

We expect our cases to run in the range of 10 to 100 million cells, depending on the size of the structure. We think most cases will be at the lower end, so we want to size our hardware for it, but still be able to handle the larger ones even at the expense of much longer calculation times.

Thanks for your help! Any suggestions/questions are more than welcomed. 

Hello Everyone, 

I recently downloaded OpenFoam for windows from the CFD support download section and the installation went effortlessly. But when I tried to run the cavity simulation following the CFDSUPPORT training pdf, I faced the  bash: blockMesh.exe: command not founderror. The frustrating part is I managed to get it running yesterday and finished the cavity test case, but today I cannot recreate what I did. In the installation folder, there are bash files in the D:\OpenFoam\20.09\cygwin64\etc and D:\OpenFoam\20.09\cygwin64\opt\OpenFOAM\OpenFOAM-dev\etc  I think the error is related to sourcing the bash file. But I am not sure as the training documents mention for windows the sourcing is done automatically.

Please help me out here as I am an absolute beginner in using OpenFoam or Linux environment. If anyone can provide the steps common to all simulation set-up and starting the OpenFOAM, I will be more grateful.

Dear Sir or Madam,
I have the following request. I would like to make a simulation of the flow of a high speed train wich reaches a closed end for my bachelor thesis. I want to do it in Openfoam. The reason why im asking this question in this forum is because the video is from the CFD-Support Youtube channel. In a Youtube video from you with the following title Train in Tunnel Passing Sudden Cross-section Change - CFD OpenFOAM® simulation with the follwing URL https://www.youtube.com/watch?v=Gyr8Y7I16KA a similar problem was shown. Is there a possibility to learn more about it? Some more Information about the dicts of the Simulation would be highly appreciated to build my simulation.
Best regards
Benedikt Bihlmayer

Hello,

Is there a possibility to increase the number of CFD components that we can put within the simulation.

Currently the limits seems to be set at 10 components.

Thanks in advance for your response.

Yours,

Martin Heylen 

Hello,

I wanted to know if turbogrid mesh in .cgns was compatible with TCAE?

When I try to import it, i get the error "The mesh has invalid format (sees picture).

Thanks in advance for any help.

Hello,

I wanted to know how to add patches to the component for which an external geometry has been imported.

Without that, I am unable to add inlet, outlet and other boundary conditions.

Hello all. There is a rectangular domain 20x40x12 m with a weak spring of the benzene vapour. The aim is to model the dispersion of benzene at the absolutely calm atmosphere (but with non-zero turbulence). I have tried a huge number of BC but failed with this task, because of the weak air currents that appear near the boundaries and at the corners. Their speed is about some centimeters per second but they are killing the process. Instead of descending to the ground (benzene has the density of 3,14), instead of penetrating through the boundary, instead of leaving the domain the benzene vapour goes up and curl and wirl ans so on. Please share your experience and help with a hint as of how to construct absolutely calm atmosphere. If it would be windy atmosphere or powerful spring of the vapour there would be no problems. Thanks.