Isentropic Relation Pressure Density Formula

Equation for calculate isentropic relation pressure density is,

P / ρ^γ = P_t / ρ_t^γ

Where,
P / ρ^γ = Isentropic Flow Relation Between Pressure and Density
P = Pressure
P_t = Total Pressure
ρ_t = Total Density
γ = Specific Heat Ratio