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Lubos Pirkl

  • Czech Republic
  • Since 2024
General Discussion
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CAE simulations. The art of the possible.


CAE simulations. The art of the possible.


What factors contribute to making CAE projects successful? In the company I work for, in 15 years, we have delivered hundreds of CAE projects to industrial companies (most of them in the turbomachinery field). Some projects were highly successful, while others were not. In this article, I would like to share a few thoughts...

Hardware for CAE
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CPU speed & scaling benchmark updated!

CFD, OpenFOAM, ...
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Question Regarding Thrust & Torque Values in DJI 9450 Benchmark Report

Hello everyone,

We are a team of university students currently working on a project to replicate the CFD simulation of the DJI 9450 propeller. First of all, we would like to thank the content creators for the excellent "Acoustic Benchmark Propeller DJI 9450" study. It has been an invaluable resource for our work.

As we try to reproduce the simulation results, we've encountered some...

General Discussion
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Patch connection problems (solved)

I'm amazed at the Check functionality. I've been eliminating one similar error after another until now.
From the directory for the component named "Top_Fan", I copied and pasted an interface patch (.stl) into the directory for the component named "Hull__Inlet__Outlet", same file name, same type: "outletInterface" with the intention t...

CFD, OpenFOAM, ...
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Twin Centrifugal Fan Component Map

A common inlet at the top feeds two (identical) centrifugal fans. I tried to connect Top_System_inlet_interface (identical to but different in name as suction outlet interface) to serve double-duty as outlet interface to both the Top_Fan (rotating) AND Bottom_Fan (rotating).

It seemed that wasn't working so it occurred to me that connecting a copy of the object with another name might. Su...

CFD, OpenFOAM, ...
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overmesh with openfoam

is it possible with TCAE to make “overmesh” meshes?

CFD, OpenFOAM, ...
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How do you measure massflow rate through the system

Hi All,


New user here. I've gone through the tutorials and forum but haven't found my answer. Asking the AI chat bot it says I need to do some scripting and change some files, which I don't believe. I feel the answer is more straight forward.


How do I measure the mass flow rate through my system? You can set the units for the report, but my report shows nothing...

TCAE Tech Support
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TCFD repord failed

Hi,

I have a problem with report at the end?

Program made all 3000 iteration ( about 1.200.000 pcs), but at the end is allways problem with the report: (see picture below).

TCAE Tech Support
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NASA HECC Tutorial

I have been trying to run the the NASA HECC tutorial provided by TCAE. The tutorial has a very dense mesh and takes verylong to run and make a speedline. In order to save computation time I tried two methods:

1. I reduced the mesh and ran the simulation for only one point on the speedline (the one with the highest efficiency). 

2. I ran the whole tutorial as is and just skipped...

Meshing for CFD and FEA
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Problems with boundary layers on TMESH

Hello again, 


I was wondering also if boundary layers are mandatory to capture precisely the turbulence near the walls or if a good refinement can be satisfying? As soon as my geometry is getting complex, my boundary layers start to collapse at certain locations on the walls

I am using a k-omega SST model with a standard wall function, so my simulation should be quit...

Meshing for CFD and FEA
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Expansion ratio on TMESH

Hello everyone,

I am currently trying to reduce my number of cells on my mesh and I was wondering how to implement and control an expansion ratio on TMESH? to have a coarse mesh that becomes thinner linearly along a pipe for example

Thanks

CFD, OpenFOAM, ...
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TCAE-Lite 25.03 Windows version failure to mesh

Hi,


I'm a new user of TCAE-Lite.

I've setup a pump case and the "check" button says the case has been setup correctly. However it fails to mesh.

The same error occurs when running the f1 tutorial case.


Any advice would be appreciated,


Thanks,

Tom

TCAE Tech Support
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Report Bug/Error: Forces are not rotated correctly in TCFD report but Coefficients

Hello,

I found you have changed the Spitfire TCFD example few versions ago so as it applies 1.5AoA - or -1.5 It does not matter actually in this scope - by rotating velocity vector and aiming to get it rotated as expected by setting forces axes rotated in Runtime evaluated quantities, so this should apply to the final report. I've simplified the example - to get faster results - and found...

General Discussion
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List of Open Source Software for Engineers



https://www.cfdsupport.com/cae-open-source-software.html


Each piece of software has its pros and cons. Usage of any of them depends on the particular project needs and many other circumst...

CFD, OpenFOAM, ...
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Request for Adjoint Optismation Case File

I am currently doing an adjoint optisimation study into internal flows into a system.