The dimensionless form of the equation ρ ∂ v z ∂ t = p l + u ( ∂ 2 v z ∂ r 2 + 1 r ∂ v z ∂ r ) .

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Chapter 7.10, Problem 85P

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The dimensionless form of the equation ρ∂vz∂t=pl+u(∂2vz∂r2+1r∂vz∂r).

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