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Time-dependent lift and drag on a rigid body in a viscous steady linear flow

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Academic year: 2021

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Figure 2 shows how K( t ) reaches the above steady state; according to (3.14), the inertial corrections to the force directly follow this evolution if the slip velocity is set abruptly to a non-zero constant value at time t = 0
Figure 4 shows that the diagonal components of K (black lines) start to depart from the t −1/2 behaviour after a few time units, which typically corresponds to the time it takes for the vorticity to reach the Saffman distance,  s = −1

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