M. Udayakumar

Bio: M. Udayakumar is an academic researcher from National Institute of Technology, Tiruchirappalli. The author has contributed to research in topics: Fin (extended surface) & Heat transfer coefficient. The author has an hindex of 2, co-authored 2 publications receiving 13 citations.

Experimental and Numerical Investigation of Mixed-Convection Heat Transfer from Protruding Heat Sources in an Enclosure

Abstract: Heat transfer from a 5-by-4 array of protruding heat sources in the bottom wall of an adiabatic enclosure is investigated experimentally and numerically. The enclosure has a fixed inlet and different outlets. Flow velocity and applied heat fluxes are varied. Steady-state temperatures of the heat sources, air inlet and outlet temperatures, and enclosure wall temperature are measured. Results indicate that the first row is the coolest, and the Nusselt numbers of the heat sources, which are near the enclosure wall, are higher than those in the inner side. There is a good agreement between the experimental and numerical results.

Numerical investigation of natural convection heat transfer from multiple heat sources in a square enclosure

Abstract: Natural convection cooling using air as a fluid is commonly used in the cooling of electronic equipment and many other devices. A three-dimensional numerical study of natural convection heat transfer from multiple protruding heat sources simulating electronic components is conducted. Computational fluid dynamics (CFD) software, FLUENT is used in this analysis. A 4 by 5 array of heat sources are embedded in the bottom wall of an adiabatic square enclosure. The heat sources with a constant heat flux source at the bottom are of square cross-section and arranged in an in-line manner. Each heat source is attached with one thermocouple, which is connected to a data acquisition system and a computer. The steady state temperatures of heat sources, air inlet, outlet and enclosure walls are measured. The analysis is carried out by varying the heat fluxes and outlet areas. The heat transfer coefficient, Nusselt number and Grashof number are obtained. Results indicate that the heat sources inside the array are hotter and the heat transfer coefficient increases almost linearly with heat source surface temperatures. Grashof number and outlet opening areas strongly influence the Nusselt number. The heat transfer coefficient for the inner heat sources in a row is lower than those near the enclosure walls. The results of numerical analysis are compared with the experiments and there is a good agreement between the two.

Stagnation point transient heat flux measurement analysis from coaxial thermocouples

Abstract: The transient heat flux measurement at stagnation point is a significant solicitation at highly compressed flow field environment. In aerodynamics surface heating point of view, the estimat...

Experimental and Numerical Investigation of Mixed-Convection Heat Transfer from Protruding Heat Sources in an Enclosure

Abstract: Heat transfer from a 5-by-4 array of protruding heat sources in the bottom wall of an adiabatic enclosure is investigated experimentally and numerically. The enclosure has a fixed inlet and different outlets. Flow velocity and applied heat fluxes are varied. Steady-state temperatures of the heat sources, air inlet and outlet temperatures, and enclosure wall temperature are measured. Results indicate that the first row is the coolest, and the Nusselt numbers of the heat sources, which are near the enclosure wall, are higher than those in the inner side. There is a good agreement between the experimental and numerical results.