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

Hi,

I installed OF4Win-20.09v2-win64.exe on my Windows PC. I am interested in using swak4Foam to set specific boundary conditions in my case. Do I need to compile it or what would be the necessary steps?

Thank you.

Hey, I was wondering if anyone could help me to understand the different solvers OpenFoam has for different purposes, I thing I have understood icoFoam and simpleFoam but if anyone could help me to know when and how to use the potentialFoam and all of them I would appreciate it a lot.

Thanks in advance for the help 

Hi, I'm a newbie to OpenFoam and I was trying to do the tutorials, I've been doing great but then I got to the motorbike one and tried to run in parallel the meshing and simulation but didn't work.

As you can see I set my meshing for parallel and gives me errors no matter if I use mpirun or mpiexec (I used both of them because I saw in other forums one of those should work), however if I delete the "-parallel" part it does everything normal.

My computer has 16 cores and the decomposePar works perfectly, it has for subDomains 6 and when i run it it gives me the processor0-processor5 folder

I would appreciate if anyone could help me

Thanks,

Armando

Aeroacoustic Analysis of Axial Fans 🔊🌀

Using cutting-edge CFD and CAA techniques, we conducted a comprehensive analysis of an axial fan's acoustic performance! 🔍🔊

Key insights:

Evaluated sound pressure level (SPL), power spectral density (PSD), and directional characteristics 🔊📊

Reconstructed acoustic signals from simulation results 🎧

Visualized fluid flow with velocity contours and vorticity 🌀💨

Leveraged the powerful TCAE simulation environment 💻🔧

🔗 PDF: https://www.cfdsupport.com/download/AXIAL-FAN-ACOUSTIC-BENCHMARK-TCAE-CFDSUPPORT.pdf

🔗 Full Case Study (download available):  https://www.cfdsupport.com/axial-fan-acoustic-benchmark.html

This advanced workflow provides valuable insights for noise reduction, acoustic design, and optimization of fan systems in industries like HVAC, automotive, and aerospace! 🏭🚗✈️

Interested in applying these techniques to your projects? 🤔 Contact us to learn more! 📩

#CFD #CAA #AcousticAnalysis #AxialFan #NoiseReduction #AcousticDesign #TCAE

I am reconstructing the case of the cyclone separator using the Euler-Euler approach given in this link. Unfortunately, many of the images and tables are corrupted, making the process quite difficult.

I have some specific questions about the Allrun file found here, especially regarding the following fragment:

echo "Modifiing and adding files in/to 0 dir..."

cd 0

rm -rv uniform

cp -v U U.water

mv -v U U.particles

rm -v nut

mv -v epsilon epsilon.water

mv -v k k.water

mv -v p p_rgh

cp -v ../0.euler/nut.particles .

cp -v ../0.euler/nut.water .

cp -v ../0.euler/T.water .

cp -v ../0.euler/T.particles .

cp -v ../0.euler/Theta.particles .

cp -v ../0.euler/alphat.particles .

cp -v ../0.euler/alpha.particles .

cp -v ../0.euler/alphat.water .

cp -v ../0.euler/alpha.water .

cp -v ../0.euler/p .

cd ..

echo "                                     ...done"

1. Why is the p field renamed to p_rgh, considering that p in simpleFoam is in Pressure/density units, and p_rgh is in Pressure units?
2. Why is nut removed and reinitialized when simpleFoam handles it?

Other questions regarding the simulation are:

Which is the drag model more adequated for solid-fluid simulation?

I would also like to know if anyone has the case folder available.

Thank you for your help.

I want to invoke API from OpenFoam for Windows, using c++ in VS under Windows. But I don't know which folder this API is located in the installation directory. Which headers should be included in my program? Additionally, is the API in the site bellow:

https://www.openfoam.com/documentation/guides/latest/api/modules.html

still available? Have their header's names and locations changed?

Greetings,

I am doing a fluent study on the tail types that UAVs have on Fluent. After entering the mesh settings in the attached style, I added pressure-farfield as a boundary condition around the inlet, outlet and enclosure in Fluent. After selecting the turbulence model k-omega, I changed the solution method to density-based. After measuring the Y + coefficient value 134 after the first analysis, I repeated the solution accordingly. At the same time, as the flow type in the solution steering section, I first selected subsonic flow and then incompressible when I did not get a result. 

My question is, while there is a converge state when solving on the inverted-v tail, I cannot get a converge state when doing this on the T-tail. Do you have any solution suggestions about this?

Hi everyone,

I am thinking about using the TMESH module to mesh my geometries via SnappyHexMesh and I was wondering if you have any recommendations (regarding the values and significations of the different parameters for example)? Any advice or material would be really helpful.

Thank you very much and have a nice day,
Alex

Hello all,

As a newbie to OPENFOAM software, I'm actually trying to redo the simulation from the article (Simulation of Moisture Ingression in Microelectronics Package to Correlate Accelerated Tests and Field Conditions Reliability). The authors used Comsol software for this simulation. I was curious as to whether this was possible with OPENFOAM.

Thank you.

Anass

Hello sir

i had gone through your webinars and various papers. recently i had read your published information regarding <TCAE-CFDSUPPORT-ACOUSTIC-BENCHMARK-PROPELLER-DJI9450> . I want to try simulation on same propeller can you please provide me cad model for dji9450 propeller that you had used in Ur simulation.

 THANK YOU

What is your recommended tool flow from Solidworks to TCAE that preserves surface names (inlet, outlet, walls etc) ?

My understanding is that unfortunately Solidworks does not preserve surface names when exporting the model as an STL file and exporting surfaces as separate STL files will produce non-conformal vertices.

Does one need to go through a third-party mesher ? I believe the Solidworks .step export preserves surface names. Is the recommended tool flow to go through a package such as Salome to create separate (but conformal) stl surface meshes ?

🔊🌪️ New CFD + CAA Benchmark on the way! Axial Fan 🌪️🔊

Get ready to experience the latest in Computational Fluid Dynamics (CFD) and Computational Aeroacoustics (CAA) with our upcoming new acoustics benchmark! 🚀

👀 Teaser Alert! 👀 Check out our sneak peek YouTube video for a glimpse into what's coming: https://youtu.be/O8EPaOdK8wM

Get ready to elevate your simulations and unlock new possibilities! 💻✨ #CFD #CAA #AxialFan #BenchmarkComingSoon

New TCAE 24.03 Release

We're happy to announce the release of the latest version of TCAE simulation software - Version 24.03! 

TCAE continues to be the go-to solution for engineers seeking powerful, user-friendly, and cost-efficient simulation software that can tackle complex engineering challenges with ease.

To introduce you to the exciting features of the new TCAE 24.03, we invite you to join our upcoming webinar. Here are the details:

Title: TCAE 24.03 Introduction

Date: Thu, Apr 11, 2024 

Time: 3:00 PM CEST

Duration: Approximately 1 hour

Agenda:

Overview of TCAE Version 24.03. Live demonstration showcasing the user-friendly interface, advanced features, and fast solvers 

Q&A Session: 

Ask your questions, and our experts will provide answers. Feel free to send your questions in advance to info@cfdsupport.com.

Speakers:

🎤 Lubos Pirkl, Co-Founder at CFD Support 

🛠️ Radek Máca, Head Engineer at CFD Support

Registration: 

Secure your spot now by registering at https://attendee.gotowebinar.com/register/6791084528975214686

Even if you can't attend the live event, register anyway to receive the recording for future viewing at your convenience.

More Information: 

Visit our website to learn more about TCAE and its capabilities: https://www.cfdsupport.com/tcae.html. Explore our publishable benchmarks and real project-based case studies, all of which are transparent and freely downloadable.

With TCAE, you not only gain access to cutting-edge simulation technology but also become a valued member of our community. Benefit from our ongoing support, training resources, and valuable insights to elevate your engineering projects.

Don't miss this opportunity to discover how TCAE Version 24.03 can empower you to overcome your engineering challenges and achieve your design goals.

We look forward to welcoming you to the webinar!

As always. We're one email away!

Best Regards, 

CFD SUPPORT Team