Temperature distribution and heat transfer in a laminar incom-pressible annular-channel flow with energy dissipation

Expressions are obtained for the temperature distribution over the section, the heat flow through the channel wall, and the coefficient of heat transfer from the fluid to the wall for the case of a laminar flow in an infinite annular channel with constant specific heat flux at the outer wall of the channel and a thermally insulated inner wall taking energy dissipation into account.     

Conjugate problem of steady heat exchange in the laminar flow of an incompressible fluid in a flat channel

The conjugate problem of convective heat exchange in a flat channel is solved by the combined application of the integral Laplace transformation and the Bubnov-Galerkin method.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 30, No. 3, pp. 512–518, March, 1976.     

Temperature distribution in a laminar stream of liquid giving up heat while flowing in a rectangular channel

Temperature distributions, heat fluxes, and Nusselt numbers at the walls have been obtained for the case of laminar flow of a liquid in a rectangular channel for various laws of internal heat release.     

Peristaltic flow of a viscous incompressible fluid in a plane channel

This article shows the effect of additional pulsations of liquid flow rate on peristaltic flow in a channel and the formation of zones of eddy flow in it.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 48, No. 1, pp. 70–74, January, 1985.     

Laminar flow of an incompressible fluid in a plane channel with uniform unidirectional injection

An experimental and theoretical study is made of flow hydrodynamics in a plane channel with a permeable wall.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 42, No. 3, pp. 372–376, March, 1982.     

Hydrodynamic characteristics of turbulent flow of an incompressible fluid in a channel with porous walls

The effect of a transverse mass flux and a pressure gradient on the shaping of the flow structure in a channel with porous walls is investigated.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 32, No. 4, pp. 588–593, April, 1977.     

Conjugate heat transfer in the laminar flow of a swirled incompressible fluid in a horizontal annular duct

The heat transfer associated with swirled flow of a heat-transfer medium in a semi-infinite annular duct is analyzed numerically. The walls of the duct have a finite thickness and exert a significant influence on the formation of the temperature fields in the fluid.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 57, No. 5, pp. 713–720, November, 1989.     

Axial laminar flow of a viscoplastic fluid in an annular tube

Approximate relations suitable for engineering calculations are derived for determining the boundary of the core when the pressure gradient is given, the boundary and width of the core when the volumetric flow rate is given, and the pressure losses.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 18, No. 6, pp. 1098–1106, June, 1970.     

Computations of incompressible fluid flow around a long square obstacle near a wall: laminar forced flow and thermal characteristics

Computations of incompressible fluid flow and heat transfer around a square obstacle with a nearby adiabatic wall have been performed in a horizontal plane. The ranges of dimensionless control parameters considered are Prandtl number (Pr) = 10–100, Reynolds number (Re) = 1–150 and gap ratio (G) = 0.25–1. The steady-flow regime is observed up to Re = 121 for G = 0.5, and beyond this Re, time-periodic regime is observed. The shift to a time-periodic regime from a steady regime occurred at greater Re than that for an unconfined square obstacle. With increasing Pr, increase in average Nusselt number values is recorded for all Re and G studied. The heat transfer augmentation is approximately 1332% at Re = 150 (Pr = 100, G = 0.25) with regard to the corresponding values at Re = 1. Lastly, a correlation for j _h factor is determined for the preceded conditions.     

Calculation of the laminar flow of an incompressible liquid around a disc and a cylinder

We study the circular flow of a viscous incompressible liquid around a disc and a cylinder, in the range of Reynolds numbers 40 Re 1000.Transted from Inzhenerno-Fizicheskii Zhurnal, Vol. 42, No. 2, pp. 290–295, February, 1982.     

Flow of a binary mixture of incompressible Newtonian fluids in a rectangular channel

The problems concerning some simple steady and unsteady flows of a mixture composed of two incompressible Newtonian fluids in an infinitely long channel of rectangular cross-section are examined. By means of finite Fourier sine transforms, the exact solutions of the field equations are obtained for the following four problems: (i) steady Couette flow in a rectangular channel, (ii) unsteady Couette flow in a rectangular channel, (iii) steady Poiseuille flow in a rectangular channel, (iv) unsteady Poiseuille flow in a rectangular channel.     

Numerical study of laminar swirled flow in an annular channel

The effect of stream rotation on the velocity distribution in an annular channel is studied by the numerical method. The degrees of swirling corresponding to the initiation of stream separation are presented as functions of the Reynolds number for different values of the geometrical parameter of the channel.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 34, No. 2, pp. 273–280, February, 1978.     

Instability of a two-phase flow in a rectangular channel

A two-phase (liquid-gas) flow in a short horizontal slit channel of a rectangular cross section with a height of 440 μm has been experimentally studied using a fluorescent method, which allowed the flow pattern to be monitored and its quantitative characteristics to be measured. It is established that two-phase flow regimes in this channel substantially differ from the classical regimes of flow in extended channels of large cross section. It is demonstrated that the formation of various two-phase flow regimes and the transitions between them in short narrow rectangular slits are determined by instability of the liquid-gas flow at the side-walls of the channel.     

Turbulent biomagnetic fluid flow in a rectangular channel under the action of a localized magnetic field

The fundamental problem of the turbulent flow of a biomagnetic fluid (blood) between two parallel plates under the action of a localized magnetic field is studied. The blood is considered to be an electrically conducting, incompressible and Newtonian fluid and its flow is steady, two-dimensional and turbulent. The turbulent flow is described by the Reynolds averaged Navier–Stokes (RANS) equations. For the numerical solution of the problem under consideration, which is described by a coupled and non-linear system of PDEs, with appropriate boundary conditions, the stream function–vorticity formulation is used. For the eddy-kinematic viscosity, the low Reynolds number k–ε turbulence model is adopted. The solution of the problem, for different values of the dimensionless parameter entering into it, is obtained by developing and applying an efficient numerical technique based on finite differences scheme. Results concerning the velocity and temperature field, skin friction and rate of heat transfer, indicate that the presence of the localized magnetic field, appreciable influences the turbulent flow field. A comparison is also made with the corresponding laminar flow, indicating that the influence of the magnetic field decreases in the presence of turbulence.