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To describe the far turbulent wake flow behind a towed body in a linearly stratified medium we use an hierarchy of semi-empirical turbulent models. The most complex model comprises differential equations for transport of normal Reynolds stresses. We give computational results demonstrating far turbulent wake dynamics both in a passively and actively stratified medium as compared to far momentumless turbulent wake dynamics. We numerically simulate the anisotropic decay of turbulence in a far wake behind a towed body. We give computational results of turbulent wake characteristics for large decay periods.

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A numerical model of passive scalar dynamics in turbulent wakes of bodies of revolution in a linearly stratified medium is constructed. To describe the flow we use a three-dimensional parabolized system of equations of motion, continuity, incompressibility, turbulent energy transport, dissipation rate, averaged concentration and dispersion of passive scalar concentration fluctuations. Computational results demonstrate the behaviour of passive scalar characteristics both for momentumless wake and in the wake behind a towed body.