Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 Issue 5 (Special Issue) 2021 07 23 Study of cavitation inception using multiphase lattice Boltzmann method with incorporating equations of state Study of cavitation inception using multiphase lattice Boltzmann method with incorporating equations of state 3151 3170 4015 10.22060/mej.2020.17997.6705 FA Eslam Ezzatneshan Aerospace Engineering Group, Dep. New Technologies Engineering, Shahid Beheshti University, Tehran, Iran Hamed Vaseghnia Aerospace Engineering Group, Faculty of New Technologies Engineering, Shahid Beheshti University, Tehran, Iran Journal Article 2020 02 25 <span style="letter-spacing: .05pt;">In the present study, a multiphase lattice Boltzmann method is implemented for simulation of the cavitation bubbles dynamics and characteristics of cavitating flows. The effect of employing various equations of state is investigated on the computing of interaction forces and the phase separation between the liquid and its vapor in the cavitating flows. Herein, the cubic equations of state of Shan-Chen and Carnahan-Starling and the non-cubic equation of state of Peng-Robinson are applied and the exact difference method is imposed to improve the numerical stability. The efficiency of the present method is examined by comparison of the results obtained for the homogeneous and heterogeneous cavitation with those reported in the literature. Then, the implemented multiphase lattice Boltzmann method is used for studying the inception and growth of the cavitation bubbles in the throat of a venturi. The effect of hydrophobicity and hydrophobicity of the nozzle wall on the cavitation dynamics is investigated and a detailed discussion is made for the results from the physical point of view. Evaluation of the present results shows that the multiphase lattice Boltzmann method with incorporating an appropriate equation of state has an excellent capability for prediction of the bubble dynamics and cavitating flow characteristics in applied geometries.</span> <span style="letter-spacing: .05pt;">In the present study, a multiphase lattice Boltzmann method is implemented for simulation of the cavitation bubbles dynamics and characteristics of cavitating flows. The effect of employing various equations of state is investigated on the computing of interaction forces and the phase separation between the liquid and its vapor in the cavitating flows. Herein, the cubic equations of state of Shan-Chen and Carnahan-Starling and the non-cubic equation of state of Peng-Robinson are applied and the exact difference method is imposed to improve the numerical stability. The efficiency of the present method is examined by comparison of the results obtained for the homogeneous and heterogeneous cavitation with those reported in the literature. Then, the implemented multiphase lattice Boltzmann method is used for studying the inception and growth of the cavitation bubbles in the throat of a venturi. The effect of hydrophobicity and hydrophobicity of the nozzle wall on the cavitation dynamics is investigated and a detailed discussion is made for the results from the physical point of view. Evaluation of the present results shows that the multiphase lattice Boltzmann method with incorporating an appropriate equation of state has an excellent capability for prediction of the bubble dynamics and cavitating flow characteristics in applied geometries.</span> https://mej.aut.ac.ir/article_4015_587524833eaf98eb779a387e33768c6a.pdf