Turbulence model in hypersonic flow
 

I am solving flow on the cone at hypersonic speed but there are some problems in the results. so i want to help in following sections..

which turbulence model should be preferable??

what should be y+ to capture the boundary layer??

what should be the thermal conductivity to observe the temperature on the wall???

what should the value of Cp???

Should i use ideal gas???

Regards