Boundary layers growth on a moving surface due to an impulsive motion and a sudden increase of wall heat flux

• Autorzy: Kumari M. , Grosan T. , Pop I.
• Języki publikacji: EN

Abstrakty

EN

In this paper we investigate the development of the momentum and thermal boundary layers over a continuous moving semi-infinite flat plate when the extemal stream starts impulsively from rest at time t = O with a constant velocity [...] It is assumed that the plate starts to supply heat to the fluid at a constant rate qw at time t = O and maintained at this rate. The problem has been formulated in a new system of scaled coordinates such that for [...] it reduces to Rayleigh type of equation and for [...] (large time) it reduces to Blasius or Sakiadis type of equation. A new scale of dimensionless time ? has been used which reduces the region of time integration from an infinite region [...] to a finite time region [...] which reduces the computational time considerably. The goveming partial differential equations are transformed into a singular parabolic partial differential equations which have been solved numerically for a range of values of the goveming parameters using an implicit finite-difference scheme. The results show that there is a smooth transition from Rayleigh solution to Blasius or Sakiadis solution as the dimensionless time [...] increases from zero to one.

Słowa kluczowe

EN

continuously moving plate; unsteady boundary layer; heat flux rate; numerical solution

PL

warstwa graniczna; metody numeryczne; strumień ciepła

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2008
• Tom: Vol. 13, no 1
• Strony: 203--215
• Opis fizyczny: Bibliogr. 19 poz., wykr.

Twórcy

autor

Kumari M.

autor

Grosan T.

autor

Pop I.

• Department of Mathematics Indian Institute of Bangalore Bangalore, INDIA,

Bibliografia

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