Computational Analysis of Free Convection in Different Cavities with Different Aspect Ratios
Manish Bhaskar1, Abhinav Saha2
1Manish Bhaskar, Department of Mechanical Engineering, Shri Shankaracharya College of Engineering and Technology, Junwani, Bhilai, Chhattishgarh, India.
2Abhinav Saha, Department of Mechanical Engineering, Shri Shankaracharya College of Engineering and Technology, Junwani, Bhilai, Chhattishgarh, India.
Manuscript received on February 22, 2014. | Revised Manuscript Received on March 16, 2014. | Manuscript published on March 20, 2014. | PP: 3-8 | Volume-2, Issue-4, March 2014. | Retrieval Number: D0415032414/2014©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering & Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Cavity and Enclosures are finding increasing applications in the aerospace, marine, transportation, and electrical, chemical, construction and consumer goods industries. In some of these applications the composites are subjected to Thermal loads. This paper deals with the computational analysis of natural convection flow in a square, Cubical, Rectangular, Triangular and trapezoidal cavity, using FEV tool ANSYS FLUENT. Where the bottom wall and vertical walls are heated linearly, and the top wall is been insulated with the maximum temperature TH and the minimum temperature with Tc. The present numerical investigation deals with steady natural convection flow in a closed square cavity when the bottom wall is sinusoidal heated and vertical walls are linearly heated, whereas the top wall is well insulated. In the nonuniformly heated bottom wall maximum temperature TH attains at the center of the bottom wall. The sidewalls are linearly heated, maintained at minimum temperature Tc at top edges of the sidewalls and at temperature Th at the bottom edges of the sidewalls. During convection incompressible fluid is taken and passed over cavities driven by temperature difference across the wall was investigated with different aspect ratio. The temperature distribution and flow pattern across the cavities were visualized. The FEV results are validated with well published results in literature and furthermore with experimentation. Results are first presented in the form of streamlines, isotherm contours, local Nusselt number, and the average Nusselt number as a function of temperature difference aspect ratio.
Keywords: Natural Convection, Cavity, Nusselt Number.