Abstract
In the present study, an adjustable coefficient is introduced in order to make the pseudo-potential multiphase model more flexible for the simulation of a wide range of surface tensions. This coefficient can be utilized for different density ratios without any limitation. First, the effect of this coefficient is evaluated by the Laplace test. Then, density and pressure profiles along the interface are plotted which indicate that the major influence of the surface tension coefficient is localized along the interface. In other words, no negative influence is observed either for the density of two phases or for their pressures elsewhere. Hence, using the proposed surface tension coefficient, it is now possible to adjust the surface tension in multiphase Lattice Boltzmann flow simulations in a wider range. However, as the surface tension coefficient increases to increase the value of the fluid surface tension, the maximum spurious velocity might increase.
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