TY - JOUR ID - 17253 TI - Temperature Effect on Moving Water Droplets at the Channel of ‎PEMFC by Multi-component Multiphase Lattice Boltzmann Method JO - Journal of Applied and Computational Mechanics JA - JACM LA - en SN - AU - Moslemi, Mehdi AU - Javaherdeh, Kourosh AU - Ashorynejad, Hamid Reza AD - Department of Mechanical Engineering, University Campus2, University of Guilan, Rasht, Iran‎ AD - Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran AD - Imam Khomeini International University-Buin Zahra Higher Education Center of Engineering and Technology, Qazvin, Iran‎ Y1 - 2023 PY - 2023 VL - 9 IS - 3 SP - 607 EP - 622 KW - Lattice Boltzmann method KW - multi-component multiphase KW - coalescence process KW - fuel cell channel KW - liquid water droplet ‎interaction DO - 10.22055/jacm.2021.39023.3332 N2 - In this paper, a multi-component multiphase pseudopotential Lattice Boltzmann method with multi relaxation time (MRT) collision operator is presented to examine the dynamic behavior of liquid droplets movement and coalescence process in the gas channel of PEMFC. In the numerical method, the forcing term is improved to achieve a high-density ratio and thermodynamic consistency. First, the density ratio, Laplace law, and contact angle are validated with previous studies. Then, different parameters, such as operating temperature, pressure difference, surface contact angle, the radius of droplets, and distance between two droplets on the droplet movement and coalescence process are studied. The results revealed by rising temperature from 30 to 80 degrees, the speed of drop increases around 6 percent. The simulation results indicated that the rising of pressure gradient increases the gas flow velocity on the channel and leads to increasing the shear force and eventually faster movement of the droplet on the gas channel. Also, investigation of various contact angles shows that a hydrophilic surface causes a resistance force between the droplet and the wall and delays the removal of droplets. Moreover, droplet coalescence is useful for droplet movement because of increasing the velocity gradient on top of the droplet; consequently, the shear force on the droplet is raised during coalescence. UR - https://jacm.scu.ac.ir/article_17253.html L1 - https://jacm.scu.ac.ir/article_17253_938576ed74f922718c1a29fa3ec7762c.pdf ER -