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“Shell” Momentum Balance. “Shell” Momentum Balance. Rate of Momentum In. Rate of Momentum Out. Sum of Forces Acting On System. R ate of Increase of Momentum. +. +. =. “Shell” Momentum Balance Z-axis. m ass flux. Rate of momentum in a cross the surface at z=0.
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“Shell” Momentum Balance Rate of Momentum In Rate of Momentum Out Sum of Forces Acting On System Rate of Increase of Momentum + + =
mass flux Rate of momentum in across the surface at z=0 Rate of momentum in across the surface at z=L Rate of momentum in across the surface at x Rate of momentum in across the surface at x+Dx Gravity force acting on fluid in the z-direction