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Mixing of Ammoniak and Exhaust

Posted August 16, 2019 at 10:00 by pconen

Dear Foamers,

in my thesis I worked with static mixers.
If you like to see my case you can see it here.
https://www.dropbox.com/sh/5rndjj0qs...Wci0dlNqa?dl=0
Feel free to ask!
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Determination of mixing quality/ uniformity index

Posted August 16, 2019 at 03:10 by pconen
Updated August 16, 2019 at 06:16 by pconen

Dear guys,

for a long time I had problems determining the mixing quality of a mixing line. Now I've come across a usable formula. I would like to share this with you.
It is the degree of uniformity also called uniformity index.
The calculation is cell-based.
U = 1 - (SUM^{N}_{i=1}(Ci-Cm))/(2*N*Cm)
with N cells
and concentration of a cell Ci
and the arythmetic agent Cm
Cm = (SUM^{N}_{i=1}(Ci))/N
The easiest way is to export the cells with...
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Connecting Fortran with VTK - the MPI way

Posted May 24, 2019 at 12:12 by sbaffini (NuTBox)

I wrote a little couple of programs, respectively in Fortran and C++, as a proof of concept for connecting a Fortran program to a sort of visualization server based on VTK. The nice thing is that it uses MPI for the connection, so on the Fortran side nothing new and scary.

The code (you can find it at https://github.com/plampite/vtkForMPI) and the idea strongly predate a similar example in Using Advanced MPI by W. Gropp et al., but makes it more concrete by adding actual visualization...
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Direct Numerical Simulation on a wing profile

Posted May 14, 2019 at 07:14 by Rackham
Updated May 14, 2019 at 08:18 by Rackham

Direct Numerical Simulation on a wing profile

1 billion points DNS (Direct Numerical Simulation) on a NACA4412 profile at 5 degrees angle of attack. Reynolds number is 350000 per airfoil chord and Mach number is 0.117. Both upper and lower turbulent boundary layers are tripped respectively at 15% and 50% by roughness elements evenly spaced in the boundary layer created by a zonal immersed boundary condition (Journal of Computational Physics, Volume 363, 15 June 2018, Pages 231-255,...
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NACA4 airFoils generator

Posted February 20, 2019 at 16:12 by student666

https://github.com/mcavallerin/airFoil_tools


generate 3D model for foils
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