Journal ArticleDOI
Nonuniform slot injection (suction) into a compressible flow
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In this article, the steady nonsimilar compressible laminar boundary-layer flow over a yawed infinite circular cylinder with non-uniform slot injection (suction) has been studied up to the point of separation.Abstract:
The steady nonsimilar compressible laminar boundary-layer flow over a yawed infinite circular cylinder with nonuniform slot injection (suction) has been studied up to the point of separation. The finite discontinuities arising at the leading and trailing edges of the slot for the uniform slot injection (suction) are removed by choosing appropriate nonuniform mass transfer distributions in the slot. The difficulties arising at the starting point of the streamwise co-ordinate, at the edges of the slot and at the point of separation are overcome by applying the method of quasilinear implicit finite difference scheme with an appropriate selection of finer step size along the streamwise direction. It is found that the nonuniform slot injection moves the point of separation downstream but the nonuniform slot suction has the reverse effect. The increase of Mach number shifts the point of separation upstream due to the adverse pressure gradient. The increase of total enthalpy at the wall causes the separation to occur earlier while cooling delays it. The yaw angle has very little effect on the location of the point of separation.read more
Citations
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Journal ArticleDOI
Non-uniform multiple slot injection (suction) or wall enthalpy into a compressible flow over a yawed circular cylinder
TL;DR: In this article, the numerical difficulties are overcome by applying the method of quasi-linear implicit finite difference scheme with an appropriate selection of finer stepsize along the streamwise direction, and the non-uniform wall enthalpy at the wall has very little effect on the skin frictions or the point of separation.
Journal ArticleDOI
Radiation effect on the turbulent compressible boundary layer flow with adverse pressure gradient
Michalis Xenos,Ioan Pop +1 more
TL;DR: The results show that the flow is influenced by the combined effect of radiation and localized suction, which moves the separation point downstream, towards the plate's end, and increases total drag.
Journal ArticleDOI
MHD compressible turbulent boundary-layer flow with adverse pressure gradient
TL;DR: In this paper, the effects of the magnetic field and localized suction on the steady turbulent compressible boundary-layer flow with adverse pressure gradient are numerically studied, and the resulting coupled and nonlinear system of PDEs is solved using the Keller's box method.
Journal ArticleDOI
Methods of optimizing separation of compressible turbulent boundary-layer over a wedge with heat and mass transfer
TL;DR: In this paper, the steady, compressible, turbulent boundary-layer flow, with heat and mass transfer, over a wedge, is numerically studied, where the fluid is considered to be a Newtonian ideal gas (air) and it is subject to a constant velocity of suction/injection applied globally or locally to the wedge.
Journal ArticleDOI
Thermal Radiation Effect on the MHD Turbulent Compressible Boundary Layer Flow with Adverse Pressure Gradient, Heat Transfer and Local Suction
TL;DR: In this paper, the combined effect of magnetic field, thermal radiation and local suction on the steady turbulent compressible boundary layer flow with adverse pressure gradient is numerically studied, where the magnetic field is constant and applied transversely to the direction of the flow.
References
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Book
Boundary layer theory
TL;DR: The flow laws of the actual flows at high Reynolds numbers differ considerably from those of the laminar flows treated in the preceding part, denoted as turbulence as discussed by the authors, and the actual flow is very different from that of the Poiseuille flow.
Book
Matrix iterative analysis
TL;DR: In this article, the authors propose Matrix Methods for Parabolic Partial Differential Equations (PPDE) and estimate of Acceleration Parameters, and derive the solution of Elliptic Difference Equations.
Flow separation in three dimensions
TL;DR: In this article, a generalized concept of flow separation is presented and the conditions in the neighbourhood of a line of separation are deduced and the resulting flow is shown to be composed of two basic elements (i) the free vortex layer and (ii) the bubble each of which is identified by a characteristic pattern formed in the solid surface by the family of limiting streamlines.
Book
Partial Differential Equations: Theory and Technique
TL;DR: The Diffusion Equation as discussed by the authors is a generalization of the Wave Equation, which is used in the Laplace Transform Methods (LTLM) and Green's Functions.
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