The Navier-Stokes equation is the fundamental equation of fluid dynamics. In one of its many forms (incompressible and viscous flow) the equation is p dt + (V. V)V) = -Vp + µ(V · V)V. In the notation, V =< u, v, w > is the three-dimensional velocity field, p is the (scalar) pressure, p is the constant density of the fluid, and u is the constant viscosity. (i) Take the dot product of V and the nabla V operator, then apply the result to u to show that du du (V.V)u = du + w + v + w- u = u + v dz he (ii) Assume u = ry 23 and find (V V)u at (1, 1, 1) where V =< 1,x, 1 >. (iii) Write out the 1st component equation of the Navier-Stokes vector equation.

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Chapter14: Fluid Mechanics
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The Navier-Stokes equation is the fundamental equation of fluid dynamics. In one of its many forms
(incompressible and viscous flow) the equation is p
Ət + (V. V)V
= -Vp + µ(V V)V. In the
notation, V =< u, v, w > is the three-dimensional velocity field, p is the (scalar) pressure, p is the
constant density of the fluid, and u is the constant viscosity.
(i) Take the dot product of V and the nabla V operator, then apply the result to u to show that
(V.V)u = (1
ди
+ v
he
+ v
+ w-
+ w
dz
u-
u = u
dz
(ii) Assume u = xy2z and find (V V)u at (1, 1, 1) where V =< 1, x, 1 >.
(iii) Write out the 1st component equation of the Navier-Stokes vector equation.
Transcribed Image Text:The Navier-Stokes equation is the fundamental equation of fluid dynamics. In one of its many forms (incompressible and viscous flow) the equation is p Ət + (V. V)V = -Vp + µ(V V)V. In the notation, V =< u, v, w > is the three-dimensional velocity field, p is the (scalar) pressure, p is the constant density of the fluid, and u is the constant viscosity. (i) Take the dot product of V and the nabla V operator, then apply the result to u to show that (V.V)u = (1 ди + v he + v + w- + w dz u- u = u dz (ii) Assume u = xy2z and find (V V)u at (1, 1, 1) where V =< 1, x, 1 >. (iii) Write out the 1st component equation of the Navier-Stokes vector equation.
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