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Some question about the advection scheme in DES |
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November 16, 2017, 23:54 |
Some question about the advection scheme in DES
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New Member
dongqinli
Join Date: Nov 2017
Posts: 7
Rep Power: 8 |
Dear everyone,
With the help of CFX 14.0, I have done a simulation about Landing gears using High resolution discretization scheme in DES form. But existence of the 2 variables named "Blending function for DES model" and "Velocity .beta" in CFD-Post really confuses me . According to the CFX Theory's Guide,the value of the former varaible is 1 denotes the user-defined scheme(e.t.c HRS) while 0 denotes Central-difference scheme. And as for HRS,the value of the "Velocity .beta" is 1 denotes the CDS while 0 denotes Upwind-difference scheme. But how can we explain the two images below? I have attached the images of "Blending function for DES model" and the "Velocity .beta". So the question is what the real discretization scheme used in "LES" region of DES? A full CDS can contribute to the "LES region" (the blue region) referring to figure 1 ,while a HRS,namely both UPS and CDS can be found in the "LES region" according to figure 2. Thanks TAKEDA dql |
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