All Growth Rates Taken From psi at point (20,20) for the 128x64 grid and point (40,40) for the 256x128 grid.
Eigenfunctions for (Re/Rm = 4, mu=rho) and (Re/Rm=10,mu=1) have no nodes, all other eigenfunctions have one node.
 
 
 

Re and Rm		mu=rho	mu=1
4	Eigenvalue	0.816898
	Growth Rate Small Grid	0.659395
	Growth Rate Large Grid	0.816741
10	Eigenvalue	0.186754	-0.032700
	Growth Rate Small Grid	0.169652	-0.032911
	Growth Rate Large Grid	0.186759	NA
20	Eigenvalue	0.576791
	Growth Rate Small Grid	0.562625
	Growth Rate Large Grid	0.576739
40	Eigenvalue	0.789160
	Growth Rate Small Grid	0.789697
	Growth Rate Large Grid	0.789855