- #1

chaosma

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then sphere has velocity u=[itex]u_0*e^{-iwt}[/itex]

In Laudau's book, he defined the velocity of fluid is:

v=[itex]e^{iwt}*F[/itex]

where F is a vector with only spatial variable involved.

The boundary condition then becomes [itex]u=v[/itex] at [itex]|x|=R[/itex],

where R is radius of sphere and origin is center of sphere.

My question is that this is a non-inertial frame, but Landau didn't introduce any

extra periodic force. Why is this true? Thank you!