Numerical investigation for heat transfer enhancement using nanofluids over ribbed confined one-end closed flat-plate

• Published in: Alexandria engineering journal Vol. 56; no. 3; pp. 333 - 343
• Main Authors: Hassan, Mohamed M., Teamah, Mohamed A., El-Maghlany, Wael M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-09-2017; Elsevier
• Subjects: Heat transfer; Impinging jet; Laminar; Mixed convection; Rib; Slot jet; Impinging jet; Slot jet; Rib; Mixed convection; Heat transfer; Laminar
• ISSN: 1110-0168
• DOI: 10.1016/j.aej.2017.03.051

Impinging jet is one of various methods of cooling with the ability to achieve high heat transfer rates and improve average surface’s Nusselt number. This method has vast industrial applications including integrated use in solar collectors, gas turbine cooling, refrigeration, air conditioning and electronics cooling. A numerical study is conducted to study the effects of using nanofluids on impinging slot jet over a flat plate with a ribbed surface. The main objective of the study was to investigate the possibility of improving the overall heat transfer rate by focusing on the improvements in the local and average surface Nusselt number values. Several parameters effects are studied including Solid Volume Fraction, Richardson number and Reynolds number. These results indicated a marked improvement in average Nusselt number with the increase in the solid volume fraction. Also, there is an amended value when the buoyancy effect is dominant over the whole domain. The results are shown in the form of streamlines, isotherms and Nusselt numbers contra other variables. The current work was simulated using a FORTRAN CFD Code, which discretizes the non-dimensional forms of the governing equations utilizing the finite volume method and solving the consequent algebraic equations using Gauss-Seidel method Utilizing TDMA.