Changes between Version 26 and Version 27 of u/erica/GudonovMethodEuler
 Timestamp:
 05/04/13 14:40:52 (12 years ago)
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u/erica/GudonovMethodEuler
v26 v27 18 18 [[Image(God.png, 35%)]] 19 19 20 In this picture, WL and WR denote the arrays of primitive fluid variables (namely, rho, u, p) , F is the numerical flux (described below), and the conservative formula is given by the Godunov scheme, also givenbelow.20 In this picture, WL and WR denote the arrays of primitive fluid variables (namely, rho, u, p) designated as the values of those variables at the adjacent cell centers, the asterisk (*) indicates a star region that is bound by two outgoing arrows, the arrows indicate the wave pattern generated in the LRP, F is the numerical flux (described below), and the conservative formula is given by the Godunov scheme, also presented below. 21 21 22 22 If we were to blow the left star region up (on the intercell boundary between cell i1 and i), what we would have is 3 nonlinear waves (contact, shock(s) and/or rarefaction(s)) being generated at this boundary IF the left and right states (WL and WR, where W is the array of primitive variables) were different. If these states are the same, then NO nonlinear waves would be generated. We would like to first find pstar, the value of pressure between the left and right waves, in the region socalled the "star region". Once this is known, we can determine the types of waves generated. Since they are propagating away from the intercell boundary, the exact values of the fluid variables along the intercell boundary depend on their relative speeds. We then would sample the solution to the LRP, along this boundary only. Once we have found the solution at this boundary, given by