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Panel Method

Posted December 16, 2020 at 16:32 by prachi
Updated January 15, 2021 at 11:05 by prachi

Panel method for 3D.
Attached Files
File Type: pptx Panel_method.pptx (62.9 KB, 234 views)
File Type: pdf Integral Equation Methods, Lecture 1.pdf (587.5 KB, 347 views)
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Title: rhoSimpleFoam for stationary compressible turbulent internals flows

Posted December 9, 2020 at 06:01 by dlahaye

1/ Introduction

The scope of these notes is to discuss the simulation of stationary compressible turbulent flow in OpenFoam using the rhoSimpleFoam solver. We assume the reader to be familiar with the concept of stationary incompressible turbulent flows and the simulation of these flows in OpenFoam. This allows us to focus here on the transition from incompressible to compressible. We target internal flow with Mach number between 0.4 and 2. The application to external flows and/or...
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Problem installing OpenFoam-v1912 from source on Mac with Clang

Posted November 15, 2020 at 12:06 by wangsen992

This problem bugged me for the whole day. Ultimately the reply from below saved my night.

However, i don't like the new file system solution since you could simply run a virtual box or a docker which are basically the same but much more elegant and portable. I want to have some approach that can install openfoam locally, and be used as a library instead of working in a separate environment.

Quote:
Originally Posted by madgeogr View Post
Hi Alexey,
I have a problem (again) when i am following the instructions
...
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Old

Min and Max Wavenumber

Posted October 26, 2020 at 16:56 by MikeBravo

Min and Max Wavenumber

https://www.researchgate.net/post/Ho...aracterisation

Quote:
Filippo Maria Denaro added an answer
December 7, 2017
Lalit
the Nyquist theorem says that for a step sampling dt you can describe the smallest wavelenght 2*dt (three samples describe a sine). For a given period lenght T, the ratio T/(2*dt) gives the maximum wavenunber you can represent
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Calculating energy/power spectra.

Posted October 10, 2020 at 14:50 by MikeBravo

Calculating Spectra:

Quote:
Originally Posted by FMDenaro View Post
Well, I suggest to do the FFT of the three velocity
components at the chosed position. However, you need a correct windowing technique as your signal is not necessarily periodic in time. Then, consider that depending on the position far from the cylinder along the wake, you can or not recover the theoretical inertial slope. Furthermore, the theoretical slope should be the same, interchanging in space and time, requiring further assumption about ergodicity.
...
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