entropy fix

autofly

the entropy fix is necesary for Roe-fds in supersonic flow.Harten' YEE'S formula is popular and used widely. but every author do some modification to it. such as the turn-on factor epslon. lamda1= U,lamda2=U-C lamda3=U+C, lamda1,which is modified with a smallest epslon only in stagment region.on contrast, lamda2,lamda3 is modified with epslon = eps*max(abs(lamda3),abs(lamsa2)). now i meet some other methods to define the epslon, such LAURA code's method.I want to get some information about the method which is used in CFL3DV6, because i get some information about it's entropy fix result in cfl3d web http://cfl3d.larc.nasa.gov/Cfl3dv6/c...w.html#precond. i want to get the detailed method of cfl3dv6, because of its easyness