Changes between Version 19 and Version 20 of u/ehansen/buildcode
- Timestamp:
- 11/01/11 11:53:29 (13 years ago)
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u/ehansen/buildcode
v19 v20 29 29 An analysis of the eigenvectors would show that there are essentially three types of waves; contact, shock, and rarefaction. The contact wave is always in the middle, and the left or right waves can be either shock or rarefaction waves. The waves divide x-t space into four distinct regions: left data, star left, star right, and right data. Below is an image showing an example of this: 30 30 31 [[Image(riemann_regions.gif, width= 600)]]31 [[Image(riemann_regions.gif, width= 400)]] 32 32 33 33 Initial data has a left state and a right state, separated by a discontinuity. It is often easiest to solve the Riemann problem using what are known as primitive variables. The primitive variables are density, velocity, and pressure. It is important to keep in mind that, apart from density, these are different than the conserved variables.