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Showing results 1 to 4 of 4 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX March 6, 2019, 16:41

Replies: 15 Better convergence with Upwind than High-Resolution advection scheme Views: 12,662 Posted By ghorrocks I am glad to hear you read the best practices... I am glad to hear you read the best practices guide. But note it is a guide, if you are getting better results with CDS rather than HiRes then I would go with CDS. If you want to explore this is...

Forum: CFX March 5, 2019, 17:10

Replies: 15 Better convergence with Upwind than High-Resolution advection scheme Views: 12,662 Posted By ghorrocks Yes, that is likely. Don't forget that the second... Yes, that is likely. Don't forget that the second order scheme in Hi-Res also is dissipative, just a lot less dissipative than the first order scheme. Central difference schemes have very low or no...

Forum: CFX February 25, 2019, 21:31

Replies: 15 Better convergence with Upwind than High-Resolution advection scheme Views: 12,662 Posted By ghorrocks If you do a simulation using the Hi Res scheme... If you do a simulation using the Hi Res scheme you will have a new variable ".beta" for the equations it is applied to. This shows the regions where the flux limiter has determined it cannot use the...

Forum: CFX September 15, 2012, 07:31

Replies: 15 Better convergence with Upwind than High-Resolution advection scheme Views: 12,662 Posted By ghorrocks Upwinding is a first order scheme and contains... Upwinding is a first order scheme and contains lots of numerical diffusion. This means the flow is damped artifically more than it should be which results in easy and tight convergence, but...

Showing results 1 to 4 of 4

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