# The Self-propulsion of a Body with Moving Internal Masses in a Viscous Fluid

*2013, Volume 18, Numbers 1-2, pp. 100-117*

Author(s):

**Vetchanin E. V., Mamaev I. S., Tenenev V. A.**

An investigation of the characteristics of motion of a rigid body with variable internal mass distribution in a viscous fluid is carried out on the basis of a joint numerical solution of the Navier–Stokes equations and equations of motion for a rigid body. A nonstationary three-dimensional solution to the problem is found. The motion of a sphere and a drop-shaped body in a viscous fluid in a gravitational field, which is caused by the motion of internal material points, is explored. The possibility of self-propulsion of a body in an arbitrary given direction is shown.

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