Control of laminar flow separation over a backward-facing rounded ramp with C-D riblets – The effects of riblet height, spacing and yaw angle

Abstract By raising the inert gas pressure and thus changing the type of gas flow chemical transport processes in tubular halogen incandescent lamps may be influenced. At medium pressures in the region of laminar flow separation of halogen and inert gas due to thermodiffusion occurs, the halogen cycle breaks down, and bulb blackening of the lamp is observed. At low and high pressure, where the streaming behaviour of the gas phase is dominated by diffusion or turbulence, separation of halogen and inert gas is overcome and the lamps stay clean. Observed pressures for changing from laminar to turbulent flow are 3.5 atm in xenon, 5.5 atm in krypton, and > 8 atm in argon in good accord with the well-known Reynolds' criterion.

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Laminar flow separation in an axi-symmetric sudden smooth expanded circular tube

Journal of Applied Mathematics and Computing ◽

10.1007/s12190-008-0097-5 ◽

2008 ◽

Vol 28 (1-2) ◽

pp. 235-247 ◽

Cited By ~ 1

Author(s):

G. C. Layek ◽

S. Mukhopadhyay

Keyword(s):

Laminar Flow ◽

Flow Separation ◽

Circular Tube

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Numerical study of magnetohydrodynamic laminar flow separation in a channel with smooth expansion

International Journal for Numerical Methods in Fluids ◽

10.1002/fld.1826 ◽

2009 ◽

Vol 59 (5) ◽

pp. 495-518 ◽

Cited By ~ 2

Author(s):

T. K. Maikap ◽

T. R. Mahapatra ◽

P. Niyogi ◽

A. K. Ghosh

Keyword(s):

Laminar Flow ◽

Flow Separation ◽

Numerical Study

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Extending the utility of perturbation series in problems of laminar flow in a porous pipe and a diverging channel

The Journal of the Australian Mathematical Society Series B Applied Mathematics ◽

10.1017/s0334270000011073 ◽

1999 ◽

Vol 41 (1) ◽

pp. 118-128 ◽

Cited By ~ 13

Author(s):

O. D. Makinde

Keyword(s):

Reynolds Number ◽

Laminar Flow ◽

Incompressible Fluid ◽

Taylor Series ◽

Flow Separation ◽

Viscous Incompressible Fluid ◽

Internal Flow ◽

Perturbation Series ◽

Porous Pipe ◽

Diverging Channel

AbstractIn this paper, we exploit a new series summation and convergence improvement technique (that is, Drazin and Tourigny [5]), in order to study the steady flow of a viscous incompressible fluid both in a porous pipe with moving walls and an exponentially diverging asymmetrical channel. The solutions are expanded into Taylor series with respect to the corresponding Reynolds number. Using the D-T method, the bifurcation and the internal flow separation studies are performed.

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