- #1
kevman90
- 3
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Homework Statement
I am going through a derivation of the thermal energy equation for a fluid and am stumped on one of the steps. Specifically, the text I am using converts the term:
P/ρ*(Dρ/Dt)
to:
ρ*D/Dt(P/ρ) - DP/Dt
where:
ρ = density
P = pressure
D/Dt = material derivative
The text says this is done using the chain rule of differentiation but I can't derive it myself. I'm far removed from calculus so maybe I'm missing something simple but any help would be appreciated.