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research-article

Cooling of a partially elastic isothermal surface by nanofluids jet impingement

[+] Author and Article Information
Fatih Selimefendigil

Associate Professor, Department of Mechanical Engineering, Celal Bayar Univeristy, Manisa, 45140, Turkey
fatih.selimefendigil@cbu.edu.tr

Hakan F. Oztop

Professor, Department of Mechanical Engineering, Technology Faculty, Fırat University, Elazığ 23119, Turkey
hfoztop1@gmail.com

1Corresponding author.

ASME doi:10.1115/1.4038422 History: Received May 03, 2017; Revised September 10, 2017

Abstract

Numerical study of nanofluid jet impingement cooling of a partially elastic isothermal hot surface was conducted with finite element method. The impingement surface was made partially elastic and effects of Reynolds number (between 25 and 200), solid particle volume fraction (between 0.01 and 0.04), elastic modulus of isothermal hot surface (between 10$^4$ and 10$^4$), size of the flexible part (between 7.5$w$ and 25$w$) and nanoparticle type (spherical, cylindrical, blade) on the fluid flow and heat transfer characteristics were analyzed. It was observed that average Nusselt number enhances for higher Reynolds number, higher values of elastic modulus of flexible wall, smaller size of elastic part and higher nanoparticle solid volume fraction and for cylindrical shaped particles. It is possible to change the maximum Nusselt number by 50.58$\%$ and 33$\%$ by changing the elastic modulus of the hot wall and size of elastic part whereas average Nusselt number changes by only 9.33$\%$ and 6.21$\%$. The discrepancy between various particle shapes is higher for higher particle volume fraction.

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