https://doi.org/10.1140/epjp/s13360-022-02789-2
Regular Article
Numerical analysis of heat transfer evacuation from a cavity confining coated micro-pin fin heat sink using lattice Boltzmann approach
1
Laboratory of Fluid Mechanics and Energetics (LMFE), Unit Affiliated to CNRST (URL-CNRTST No 16), Department of Physics, Faculty of Sciences Semlalia, Cadi Ayyad University, BP 2390, Marrakesh, Morocco
2
Faculty of Applied Sciences-Ait Melloul, IZU, BP 6146, Agadir, Morocco
Received:
31
January
2022
Accepted:
1
May
2022
Published online:
16
May
2022
The study focuses on the effect of adding a conductive coating material to a micro-pin fin heat sink on the rate of thermal energy evacuation using the Multiple-Relaxation-Time lattice Boltzmann method. The effect of the governing parameters such as Rayleigh number, 
(
), relative thermal conductivity, 
(
) and thickness of the conductive coating paste, 
(
) on the conjugate natural convection heat transfer is evaluated numerically for a fixed radius of the heated fin (
). The accuracy of the numerical tool was checked by successfully reproducing credible analytical, numerical and experimental data available in the literature. The obtained results show that the addition of conductive coating materials to the micro-pin fin heat sink contributes significantly to improving the thermal energy evacuation. The improvement in terms of heat evacuation recorded with the mica layer paste always overcomes that reached using silicone layer paste with a maximum relative difference of 63.1% at 
for a single fin and 20.1% at 
for sixteen fins. The use of a coating material with a high thermal conductivity and a suitable thickness enhances the evacuation of heat generated by the electronic component via the micro-pin fin heat sink.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
