Flow stability in a rotating porous pipe

Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No.2, pp. 19–23, March–April, 1992.     

Thermomechanical instability of a heat releasing granular layer

A study is made of a homogeneous granular layer of thickness h and porosity in which heat is released uniformly with bulk power q. The heat is taken up by a uniform gas flow through the layer in the transverse direction of the y axis at velocity v ° produced by a given pressure difference across the layer. This scheme corresponds to the simplest model of a gas-cooled nuclear reactor, in which the heat release does not depend on the thermogasdynamic state. The case of a chemical reactor with heat release of Arrhenius type is considered in [1, 2].Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 2, pp. 45–53, March–April, 1979.     

Occurrence of rotational motion resulting from hydrodynamic instability

It is shown that the stable secondary regime of a parallel flow simulating the entrance length of a jet includes a steady differential rotation. The mechanism of occurrence of nonzero angular momentum is discussed and a comparison is made with the available experimental data.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 51–59, September–October, 1985.     

Effect of channel blockage on motion in the separation zone behind bluff bodies

The thermal differential method of determining stagnation points has been used to investigate the effect of channel blockage on the length of the separation zone behind shoulders and steps. In the case of a back step a theoretical solution obtained for the zone length and vorticity is found to be in satisfactory agreement with the experimental data.     

Determination of the turbulent Prandtl number in an asymptotic boundary layer with suction

The problem of heat transfer in a turbulent asymptotic boundary layer with suction is solved in the framework of the monoharmonic model. The flow is one dimensional on the average, which is why it is chosen for investigation. The theoretically determined mean and pulsation characteristics of the flow, in particular the turbulent Prandtl number, agree with the experimental results for a boundary layer.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 1, pp. 74–79, January–February, 1981.     

Self-similar movement of a viscous gas in a channel

The results presented in [1] refer primarily to dropping liquids for which the influence exerted by the thermal conditions on the flow is related to the temperature dependence of the viscosity. The self-similar flow of a viscous gas in a channel with a linearly increasing wall temperature is examined in this paper. The influence exerted by the Reynolds and Prandtl numbers on heat exchange and the hydrodynamics of the flow is analyzed.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 3, pp. 47–54, May–June, 1976.The author wishes to thank A. F. Seleznev for carrying out the calculations and V. N. Shtern for discussing the paper.