can use rhoCentralFoam for steady state problems?
 

1)is rhoCentralFoam suitable for compressible steady state simple problems like a pipe with one inlet and one outlet?

2)and how set internalField values?
I want to set inlet velocity=250 T=1000K and outlet pressure be 870000pa
then internalField U be zero and p be 870000 and T=1000K is correct?