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 that in the report forces are never rotated as expected despite that Coefficients are rotated, you can test this by changing the Forces in Runtime evaluated quantities to 0,0,1,1,0,0 in the example and see that only Coefficients are changed in the report.

Tested on TCAE 25.03v1

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Over 50 man-years of consistent development on top of open-source condensed in unlimited software at the cost of a daily cup of coffee. 

https://www.cfdsupport.com/tcae-lite.html

hashtag#CFD hashtag#Simulation hashtag#FluidDynamics hashtag#FlowVisualization

I am looking to simulate the power output of an in pipe axial turbine, I don't have any experience in CFD simulations and I've decided to brake down the project into 3 parts, first I am going to simulate just the pipe in which the turbine is going to be housed, then a static state with the turbine in the pipe, and finally setup the rotation of the turbine.

I've made a quick 3D model of the pipe and I tried copying the setup from the pipe example, I ran into a problem where the mesher consumes all the available RAM on the computer and locks it up, I assume the STL mesh has a hole somewhere but I couldn't find it, I've had issues before with glitches in STL meshes made in Rhinoceros 3D, the modeling program I used, so I decided to recreate the pipe example with the STLs from the example, and that meshed successfully, but I got an error in the TCFD part "TCFD calculation failed. Please consult the chapter 'Rescue list' in the TCAE Manual for possible reasons of the failure.", I couldn't find the Rescue list chapter in the manual online.

Also the TCAE Output gives this error:
"Application decomposePar failed.
For detailed information check error log at: "C:\Users\Name\Desktop\CFD Test\CFD_test\simulationRun1\TCFD\logRun\solve-err-decomposePar-stationary-1.log"".

And in that log file is:
"--> FOAM FATAL IO ERROR:
Cannot find patchField entry for Co1_pipe-wall_wall

file: C:/Users/Name/Desktop/CFD Test/CFD_test/simulationRun1/TCFD/stationary/0/nut/boundaryField from line 32 to line 54.

    From function void Foam::GeometricField<Type, PatchField, GeoMesh>::Boundary::readField(const Foam::DimensionedField<TypeR, GeoMesh>&, const Foam::dictionary&) [with Type = double; PatchField = Foam::fvPatchField; GeoMesh = Foam::volMesh]
    in file /opt/OpenFOAM-dev/src/OpenFOAM/lnInclude/GeometricBoundaryField.C at line 184.

FOAM exiting"

Attached is a rough diagram of how will the setup work.

I don't have an idea what to try next, and would be thankful for any assistance.

Hello everyone,


I have questions about the calculation of circumferential angles circA by TCAE.


I have understood that, if a surface is oriented in the radial direction, circA on this surface will be the angle between the tangent and the velocity in the radial/tangential plane. According to graphical representation of the manual, circA shoud be positiv when the projection of the velocity in the radial/tangential plane points out (of the cylinder in the picture), and negativ when it points in.


Let's imagine that we are on a surface radially oriented where some back flow occurs and that the absolute velocity has a circA > 90° when there is no back-flow. In most of the cells of the surface, circA points out of the cylinder (90° < circA < 180°), but when back-flow occurs, circA points in the cylinder (-180° < circA < -90°). Thus, there are positiv and negativ values of circA at the same time, isn't it ? Therefore, because the circA are either > 90° or < -90°, in the in the interfaces-final.csv file in simulationRun1/TCFD/stationary/postProcessing/surfaceName/0/ folder, it seems to me that surface averaged value of circA is distorted.

I had this reflection because I find particularly high values of circA on some surfaces of my simulations.

Could someone confirm my interpretation ? Or explain me why it isn't true ?

Besides, does someone know how to visualize circA angles on Paraview after a calculation ?


Thanks in advance !


Zacharie

I'm watching the TCFD First Tutorial Run video and want to insure that the results obtained on my system match those of the video tutorial but I don't have the files for the tutorial axial-fan-simple.

Are the files for the tutorial axial-fan-simple available for download? If so, where may I find them?

I am using CAE Processor library version 24.03v1

When having run the pipe tutorial, please see image, above, I expected to see more residuals, but being the beginner I have no clue.

Also, the output messages display an alert: "...ERROR: In C:/ParaView/ParaView-5.10.1-src/VTK/Rendering/Context2D/vtkContext2D.cxx, line 176
vtkContext2D (0x14ed61acbf0): Attempted to paint a line with <2 points..."

Is that to be expected?

Thanks in Advance

~ David

Ahmed Body Benchmark. 🚗 Ready to dive into car aerodynamics? Check out the Ahmed Body Benchmark! 🌬️ It's like the ultimate CFD test drive for external aerodynamics.

The Ahmed body is like a simplified car model, but it's got all the cool air flow stuff that real cars do! 🏎️💨 We're talking Drag Coefficient, Velocity Profiles, Velocity Field, and even the Wake structure. We're putting our TCFD simulation results to the test in the wind tunnel, comparing them with real experimental measurements. 🌪️✅

Full Case Study (download available):

https://www.cfdsupport.com/ahmed-body-tcfd-benchmark.html

PDF study:

https://www.cfdsupport.com/download/TCFD-CFDSUPPORT-Ahmed-Body-External-Aerodynamics-Benchmark.pdf

#CFD #Aerodynamics #FluidDynamics #AhmedBody

Ahmed Body Benchmark. 🚗 Ready to dive into car aerodynamics? Check out the Ahmed Body Benchmark! 🌬️ It's like the ultimate CFD test drive for external aerodynamics.

The Ahmed body is like a simplified car model, but it's got all the cool air flow stuff that real cars do! 🏎️💨 We're talking Drag Coefficient, Velocity Profiles, Velocity Field, and even the Wake structure. We're putting our TCFD simulation results to the test in the wind tunnel, comparing them with real experimental measurements. 🌪️✅

Full Case Study (download available):

https://www.cfdsupport.com/ahmed-body-tcfd-benchmark.html

PDF study:

https://www.cfdsupport.com/download/TCFD-CFDSUPPORT-Ahmed-Body-External-Aerodynamics-Benchmark.pdf

#CFD #Aerodynamics #FluidDynamics #AhmedBody

Francis Turbine CFD & FEA + FSI benchmark 

TCAE  – the ultimate simulation software for engineers and researchers! A comprehensive simulation environment, based on open source, offers a wide range of analysis capabilities, including CFD, FEA, FSI, and modal analysis.

The following study focuses on the analysis of a Francis turbine, one of the most widely used hydro turbines in the world. This complex analysis takes you step-by-step through the entire simulation process, from preprocessing to advanced CFD & FEA simulations. The study also includes FSI and modal analysis, providing a complete understanding of the turbine's behavior under various operating conditions.

TCAE was used for this analysis, offering users a robust simulation environment with a user-friendly interface. With TCAE, engineers and researchers can easily simulate complex systems and processes, gaining valuable insights into their behavior.

The Francis turbine CFD & FEA + FSI benchmark presented in this study is a validation of a real existing turbine, providing accurate results that can be used for further optimization and improvement. Whether you're working in the energy industry or researching new technologies, TCAE is the perfect simulation software for your needs.

Full Case Study (download available):

https://www.cfdsupport.com/francis-turbine-cfd-fea-fsi-simulation.html

PDF report:

https://www.cfdsupport.com/download/TCFD-CFDSUPPORT-Francis-Turbine-Benchmark.pdf

Hi, I am trying to use TCFD for distributed computing on the high performance computing platform of my own department. This platform uses slurm as the job scheduling system. When I use the command: `srun -n 127 -N 10 -p normal redDyMSolver -rotatingVelocityFields -parallel`, the error shown in the picture occurs.

I am not sure if it is a problem with the high performance computing platform or with TCFD. Can anyone help me?

Or is there any other way for me to perform distributed computing with TCFD on the high performance computing platform?

Our team at CFDSUPPORT believes that success in engineering projects is the result of a combination of focus, skills, experience, patience, and dedication, rather than quick actions in a rush. To ensure accuracy, CFDSUPPORT regularly tracks and compares CFD results with real-world physical measurements. An example of our commitment to accuracy is the Centrifugal Compressor Benchmark project. This project was a collaboration between CFDSUPPORT and compressor manufacturer CZ a.s. The goal of the benchmark validation was to assess the accuracy of the TCFD software and compare its simulation results with actual compressor measurement data. By continuously striving for accuracy, CFDSUPPORT and its partners are able to deliver more reliable and trustworthy results for their clients.

https://www.cfdsupport.com/centrifugal-compressor-cfd-benchmark.html

#Simulation #CAE #CFD #FSI #CAA #Optimization #HPC #engineering #turbomachinery

Axial Turbine Stage - test topic. Axial Turbine Stage CFD. It is hard not to be emotional when seeing an axial turbine stage CFD. The axial turbine stage was our first big CFD project made here at CFDSUPPORT. In a way, it had preset our destiny - turbomachinery simulations. Here is a little example of how now, ten years later, TCAE runs the whole complex process in one command (or click). By TCFD: https://www.cfdsupport.com/axial-turbine-cfd-simulation.html

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. 

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. 

Magnus Effect - A phenomenon that is commonly associated with a spinning object moving through the air. Compared to the non-spinning object, the spinning one produces a significant lift force. We tested this phenomenon in the study of the aerodynamics of rotating and non-rotating balls with TCFD back in 2016. 

https://youtu.be/MvIhJhhW6jc

#Simulation #CAE #CFD #FEA #FSI #CAA #Optimization #HPC #engineering #turbomachinery

An exhaust manifold is an important part of every combustion engine that collects the exhaust gases from multiple cylinders into one pipe. The gas flow in the manifold can be extensively analyzed and optimized by CFD analysis. Have a look at an example of an aerodynamic analysis of exhaust manifold simulation by TCFD. https://youtu.be/EIn2oUIX6VM