INSTABILITY OF RAYLEIGH-BERNARD CONVECTION AFFECTED BY INCLINED WALL TEMPERATURE VARIATION

1. Sadoon Ayed, Univerzitet u Nišu, Mašinski fakultet, Serbia
2. Milos Jovanovic, Faculty of Mechanical Engineering Niš , Serbia
3. Gradimir Ilić, Faculty of Mechanical Engineering Niš , Serbia
4. Predrag Živković, Faculty of Mechanical Engineering Niš , Serbia
5. Mladen Tomić, The School of Higher Technical Professional Education, Niš, Serbia

In this paper the direct numerical simulation of the full Navier-Stokes equation in vorticity-stream function form for the case of an inclined fluid layer with temperature modulation on the upper plate is presented. The fluid flows between parallel plates which are inclined with some angle α in respect to the horizontal plane. The lower side of the viscous fluid layer is constant temperature surface.
Since the temperature of the upper plate is higher than the lower plate, Rayleigh-Benard convection appears mostly in the upper zone. We investigate the stability of this convection for water as a working fluid. The results of direct numerical simulation are presented as fields of temperature, vorticty, stream function and velocity.
This paper is concerned by the National Program of Energy Efficiency, project number: III42008, funded by the Government of Republic of Serbia.

Ključne reči: Direct numeric simulation; Navier-Stokes equations; Rayleigh-Bernard convection; Non-linear flow instability; Viscous fluid flow

Tematska oblast: Energy and Thermal Engineering

Datum: 03.03.2015.

12th International conference on accomplishments in Electrical and Mechanical Engineering and Information Technology (DEMI 2015)


Ostali radovi sa konferencije


Pretraži radove