Separation characteristics of fluid flow in a pipe with wavy surface

• Autorzy: Mahmud S. , Mamun M. A. H. , Sadrul Islam A. K. M.
• Języki publikacji: EN

Abstrakty

EN

Separation characteristics of fluid flow in a pipe with sinusoidal wavy surface are investigated numerically. The pipe waviness is characterized by a wavelength ('lambda') and an amplitude (a) of the wave. Steady laminar flow of a Newtonian fluid is considered. Governing equations are discretized using the control volume based Finite-Volume method with collocated variable arrangement. SIMPLE algorithm is used and TDMA solver is applied to solve the system of equations. The length of the pipe is kept four times the wavelength (4*'lambda'). The effect of surface waviness, determined by the wavelength-amplitude ratio 'lambda'/a (=L*) , on separation characteristics of fluid flow is presented. The simulation work has been carried out for L*= 11.0 - 30.0 and for the Reynolds number ranging from 50 to 2000. The structure of separation bubble depends strongly on the waviness of the surface for a particular Reynolds number and changes a little with the wave number n. Finally the flow field is presented in the form of stream function and axial velocity profiles for understanding the separation phenomenon.

Słowa kluczowe

EN

critical Reynolds number; separated flow; separation bubble; wall vorticity; waviness

PL

hydromechanika; przepływ cieczy; falistość

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, no 4
• Strony: 1263--1278
• Opis fizyczny: Bibliogr. 10 poz., wykr.

Twórcy

autor

Mahmud S.

• Department of Mechanical Engineering, University of Waterloo 200 University Avenue West, Waterloo, Ontario CANADA, N2L3G1

autor

Mamun M. A. H.

• Department of Mechanical Engineering, University of Waterloo 200 University Avenue West, Waterloo, Ontario CANADA, N2L3G1

autor

Sadrul Islam A. K. M.

• Department of Mechanical Engineering Bangladesh University of Engineering and Technology (BUET) Dhaka-1000, BANGLADESH

Bibliografia

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