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Abstract
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The free energy-based lattice Boltzmann (FEB-LB) model is a very powerful method and
is fully consistent with Maxwell’s equal-area construction, especially for low temperature
conditions. Drawbacks of this model are its massive amounts of calculations and large
computation time (i.e., iteration number), therefore it is often executed on supercomput-
ers or parallel computing systems. In this paper, the three-dimensional FEB-LB model
has been optimized using the Runge-Kutta fourth-order method. It is shown that using
the fourth-order Runge–Kutta method, the computation time is decreased about four
times. In addition, in the present work, using the optimized FEB-LB model, the effects
of surface tension and interface width on spurious velocities in the liquid–gas interface
have been investigated.
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