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This study determines hydrodynamic characteristics of underwater glider based on the numerical solution of Reynolds-averaged Navier-Stokes equations. Examined are the methodological aspects for determination of rotary derivatives coefficients for underwater object hydrodynamic forces and moments based on the “sliding computational meshes” mechanism implemented in many software packages of fluid mechanics. Main development stages of the calculation model for solving similar tasks are indicated. The non-stationary calculation of the viscous fluid flow past an underwater object resulted in the determination of velocity and pressure fields in the stream. Obtained are the relations that allow the coefficients of rotary derivatives of hydrodynamic forces and moments to be determined based on the preset values of hydrodynamic impacts.
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