TVD grid resolution
 

Hi

From what I have read it appears the simulations using TVD method have relatively coarsely meshes. From my personal experiences, the finer mesh the more problems i encounter with boundary conditions and 'streaklines'. Why is this so?

Shuo

Re: TVD grid resolution
 

you use TVD methods in coarse meshes because you cant see much differences between discretization schemes in fine meshes. as you may know, even FOU works good enough in a fine grid. the main idea to develop TVD is to achieve high resolution in coarse grids.

Re: TVD grid resolution
 

Sorry what does FOU stand for? ALso could you please provide me with some references on grid resolution and TVD methods.

Thanks Shuo

Re: TVD grid resolution
 

FOU= First Order Upwind unfortunately I dont remember any reference on grid resolution. good luck

Re: TVD grid resolution
 

My personal experience shows that fine grids introduce instabilities and reflections from the 'non-reflecting B.C.'