@Article{cmes.2023.028951,
AUTHOR = {Siham Hammid, Khatir Naima, Omolayo M. Ikumapayi, Cheikh Kezrane, Abdelkrim Liazid, Jihad Asad, Mokdad Hayawi Rahman, Farhan Lafta Rashid, Naseer Ali Hussien, Younes Menni},
TITLE = {Overall Assessment of Heat Transfer for a Rarefied Flow in a Microchannel with Obstacles Using Lattice Boltzmann Method},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {138},
YEAR = {2024},
NUMBER = {1},
PAGES = {273--299},
URL = {http://www.techscience.com/CMES/v138n1/54267},
ISSN = {1526-1506},
ABSTRACT = {The objective of this investigation is to assess the effect of obstacles on numerical heat transfer and fluid flow
momentum in a rectangular microchannel (MC). Two distinct configurations were studied: one without obstacles
and the other with alternating obstacles placed on the upper and lower walls. The research utilized the thermal
lattice Boltzmann method (LBM), which solves the energy and momentum equations of fluids with the BGK
approximation, implemented in a Python coding environment. Temperature jump and slip velocity conditions
were utilized in the simulation for the MC and extended to all obstacle boundaries. The study aims to analyze
the rarefaction effect, with Knudsen numbers (Kn) of 0.012, 0.02, and 0.05. The outcomes indicate that rarefaction
has a significant impact on the velocity and temperature distribution. The presence of nine obstacles led to slower
fluid movement inside the microchannel MC, resulting in faster cooling at the outlet. In MCs with obstacles, the
rarefaction effect plays a crucial role in decreasing the Nusselt number (Nu) and skin friction coefficient (Cf).
Furthermore, the study demonstrated that the obstacles played a crucial role in boosting fluid flow and heat transfer
in the MC. The findings suggest that the examined configurations could have potential applications as cooling
technologies in micro-electro-mechanical systems and microdevice applications.},
DOI = {10.32604/cmes.2023.028951}
}