Changes between Version 100 and Version 101 of u/erica/RoeSolver

Timestamp:

05/31/13 14:50:53 (11 years ago)

Author:

Erica Kaminski

Comment:

—

u/erica/RoeSolver

@@ -152 +152 @@
 for a left sonic rarefaction. For a right sonic rarefaction, the coefficients are slightly adjusted. Note that the entropy fix requires estimates for the velocity and sound speed of the star region, ustar and astarL. We get estimates of these using the Roe approach for linearizing the Euler equations. They are listed in Toro, section 11.4.3.
 
+Here is a screen shot of my code:
 
-[[Image(Roe1.png, 50%)]]
-[[Image(Roe2.png, 50%)]]
-[[Image(Roe3.png, 50%)]]
 
+[[Image(Roe1.png, 100%)]]
+[[Image(Roe2.png, 100%)]]
+[[Image(Roe3.png, 100%)]]
+
+and corresponding files, modules, etc., are here: [http://www.pas.rochester.edu/~erica/solver.f90 Exact Riemann Solver -module], [http://www.pas.rochester.edu/~erica/God_Roe.f90 Roe Solver - main program], http://www.pas.rochester.edu/~erica/GodRoeproblem.data problem.data file]. To compile, simply type '''''gfortran solver.f90 God_Roe.f90 -o program'''''.
 
 
 = Results, Entropy Fix Code =
 
-
+The code works correctly. Here are the 4 tests in Toro verifying this. 
 
 == Test 1 - Sod Test == 
@@ -171 +174 @@
 == Test 2 == 
 
-Fails with the Roe Solver.
+The Roe solver fails with low density flows such as that generated in this test. This is the major short coming of the Roe Solver, that is not present for the other approximation methods we have studied such as PVRS models.
 
 == Test 3 ==
@@ -192 +195 @@
 [[Image(RoeUTest5.png, 35%)]]
 [[Image(RoePTest5.png, 35%)]]
-
-= Discussion = 
-
-
-