Heat and mass transfer for turbulent flow of chemically reacting gas in eccentric annular channels

An algorithm is proposed for calculating the velocity, temperature, and concentration fields under conditions of cooling of a cylindrical heat-releasing rod, placed off-center in a circular casing pipe, by a longitudinal flow of chemically reacting gas [N₂O₄].Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 53, No. 2, pp. 186–191, August, 1987.     

Heat and mass transfer in porous media

A brief survey of works concerned with transfer processes in porous media is given. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 71, No. 1, pp. 5–18, January–February, 1998.     

Heat and mass transfer in condensation of water vapor from moist air

Results of an analysis of heat and mass transfer in condensation of vapor from moist air are presented. The computational model is based on the solution of integral relations of boundary-layer energy and diffusion using the analogy of heat- and mass-transfer processes. The effect of the temperature and concentration boundary conditions on the relation of the components of the heat flux on the wall is analyzed. Results of calculations are compared to available experimental data. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 71, No. 5, pp. 788–794, September–October, 1998.     

Heat and mass transfer processes in two phase He II/vapor

Modeling heat and mass transfer characteristics of two phase He II is discussed. The case considered assumes that the channel flow is one-dimensional and stratified, with mass exchange between the two phases. Two specific examples are considered in some detail. The first is the heat and mass transfer characteristics for small liquid flow rate. Use of several simplifying assumptions allows the problem to be reduced to solution of a one-dimensional ordinary differential equation. The result is a non-dimensional expression for the liquid level or void fraction along the channel. A set of dimensionless parameters are defined that establish the relative contributions of vapor mass transport and counterflow in the He II. The model also predicts the temperature profile and vapor mass flow rate. The second case concerns the flow of liquid under nearly isothermal conditions with relatively small vapor mass flow rate. Under these conditions, the flow may be modeled using classical hydrodynamics taking into consideration the unique characteristics of the He II. Results of these models are compared to experimental data for heat and mass transfer in a two phase He II/vapor flow.     

Nonisothermal flow of chemically reacting media with viscosity depending on temperature and pressure

The article investigates heat exchange and resistance when non-Newtonian, chemically reacting liquids, whose viscosity depends on the flow rate, the temperature, the pressure, and the degree of conversion, flow through flat pipes.     

Convective transfer processes in chemically stable and reacting liquids with an internal structure

Dynamic processes are studied in media with softly and hardly internal destroyable configurations. A method is examined for the measurement of properties of media with spatial separation of the chemical transformation stages and thermal hydrodynamic measurements.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 53, No. 5, pp. 781–789, November, 1987.     

Heat and mass transfer and duration of the desublimation of water vapor in vacuum

Certain features of the mechanism for the growth of the condensed phase during desublimation of water vapor in vacuum are examined. Approximate equations are found for the duration of water-vapor desublimation on a flat plate.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 27, No. 2, pp. 231–238, August, 1974.     

Heat and mass transfer in the condensation region of vapor filtering in a disperse layer

A calculation of the process of water-vapor condensation as it filters through a disperse medium is given. Relations are obtained for determining the rate of growth and the magnitude of the heated zone.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 46, No. 3, pp. 438–441, March, 1983.     

Heat and mass transfer during condensation of water vapor from moist air in narrow channels

The results of an experimental investigation of heat and mass transfer during condensation of water vapor in narrow channels at pressures P=(0.133–1.0) · 10⁵ N/m² and velocities of the moist gas v_max=(0.5–10) m/sec are presented.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 21, No. 1, pp. 71–74, July, 1971.     

Heat and mass transfer in vitroplastics

Mathematical models of heat transmission in oriented vitroplastics are analyzed and methods of determining the parameters of these models are described.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 24, No. 4, pp. 618–626, April, 1973.     

Heat transfer associated with vapor condensation from vapor-gas mixtures

Reports results of a theoretical analysis and experimental investigation of heat transfer accompanying vapor condensation from vapor-gas mixtures. Gives a dimensionless equation for estimating the surface necessary for vapor condensation in the presence of an inert gas.     

Heat transfer in anisotropic metallic media

The temperature distribution over the cross-section of a metallic sample with anisotropic kinetic coefficients heated by an electric current in liquid helium has been studied.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 58, No. 4, pp. 670–675, April, 1990.     

Influence of variable permeability on the dispersion of a chemically reacting solute in porous media

In this paper in the first part, the influence of variable permeability on the two MHD basic flows in porous media is studied numerically. It is seen that the variable permeability due to random packing causes the hydromagnetic channelling in both the flows. Further, it is also observed that the flow in both the cases is retarded for any increase in the magnetic parameter.

In the second part, the influence of variable permeability and the effects of homogeneous and heterogeneous reactions on the dispersion of a solute in the above two basic flows are investigated. In the case of diffusion with a first order homogeneous reaction, in both the flows, the variation of permeability increases the effective dispersion coefficient while it decreases with increase in the magnetic parameter. In the case of diffusion combined with homogeneous and heterogeneous chemical reactions, the variation in permeability again increases the effective dispersion coefficient while with increase in magnetic parameter causes a decrease in the effective dispersion coefficient. Several earlier results follow as particular cases of the present study.     

On the use of sector-type mass spectrometers for measuring partial pressures and total pressures

The properties of magnetic sector and electric sector mass spectrometers are compared with respect to their use as partial pressure analysers. It is shown how these mass spectrometers may be changed into total pressure gauges, by suitable choice of the ion generation mechanism.     

Heat and mass transfer in laminar-vacuum insulation

Nonstationary heat and mass transfer in laminar-vacuum insulations are investigated experimentally and theoretically in application to their operating conditions in cryogenic vessels.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 32, No. 5, pp. 814–821, May, 1977.     

Heat and mass transfer in skin formation

A mathematical model of the heat conduction and diffusion on heating an oxidizing metal is presented, together with a numerical method of calculation.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 53, No. 1, pp. 141–148, July, 1987.     

Heat and mass transfer in heat pipes with noncondensing gas

An experimental study is described concerning the performance parameters of heat pipes with noncondensing gas. The test results are found to agree closely with calculations.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 25, No. 2, pp. 254–260, August, 1973.     

Convective heat and mass transfer of reacting particles at low Peclet numbers

The problem of convective diffusion to a spherical particle in a gas is solved under the condition that the surface chemical reaction rate depends on the reagent concentration near the surface.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 43, No. 1, pp. 131–134, July, 1982.