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Order of advection schemes
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TOPIC: Order of advection schemes

Order of advection schemes 7 years 4 months ago #27186

  • SDAC
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Hello,

I've not had that much experience with some of the advection schemes in Telemac 3D, and in the manual I couldn't find anything which describes the orders. What are the order of accuracy for the advection schemes?

Many thanks
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Order of advection schemes 7 years 4 months ago #27212

  • SDAC
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The main one I'm unfamiliar one is the Leo Postma scheme. The others are documented in their basic form in Hervouet (2007). Is there any documentation for Leo Postma?
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Order of advection schemes 7 years 4 months ago #27249

  • jmhervouet
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Hello,

A priori you can always take the N scheme which is a bit less diffusive. The Leo Postma scheme considers fluxes along the segments in a prism, so 9 segments per prism, the N scheme considers also cross segments of the 3 rectangles of the prism, so 6 extra fluxes, and this is used to decrease the numerical diffusion.

With best regards,

Jean-Michel Hervouet
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Order of advection schemes

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