VORTEX PATTERN OF VARYING REYNOLD’S NUMBER WITH FIXED ASPECT RATIO, AND VICE VERSA IN A LID DRIVEN SQUARE CAVITY
Aliyu A. Baba1, Bello Zubairu2 & Sunday Ayigun3
1Department of Mechanical Engineering, Federal Polytechnic, Mubi, Adamawa State
2 Department of Chemical Engineering, Federal Polytechnic, Mubi, Adamawa State
3Department of Science Laboratory Technology, Federal Polytechnic, Mubi. Adamawa State
E-mail: adamuldam@yahoo.com; adamuldam@gmail.com
ABSTRACT
The simulation of flow for laminar fluid in lid driven square cavity was conducted by employing a code that run in MATLAB and in the first simulation, a fixed value of the Reynold’s number of 600 was maintained, it was observed from the figures and results that as the aspect ratios were varied (increased) from 0.3, 0.4 and 0.6, the vortex tends to increase in number of streamlines closing the spaces between each other and widening to occupy the bottom right. However, in the second simulation, where the aspect ratio of 0.2 was maintained and varying different Reynolds numbers of 400, 500 and 600, the vortex formed also increases and becoming too close to one another as the Reynold’s number increases, thereby indicating that the pressure coefficient inside the lid square cavity is controlled by the aspect ratio as well as the Reynold’s number.
Keywords: lid driven square cavity, Reynold’s number, Aspect ratio, Vortex.
