An airblast hazard simulation engine for block caving sites

Galindo‐Torres, S. A.; Palma, Sergio; Quintero, Sandra Ximena Carvajal; Scheuermann, Alexander; Zhang, X.; Krabbenhøft, K.; Ruest, Marc; Finn, Donal

doi:10.1016/j.ijrmms.2018.04.034

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…With these assumptions, the internal fluid effect vanishes, and the hydrodynamic force calculated by Equations (16) and 17is the same as that by the original IMB method. Clearly, these assumptions (Equations (26) and 27) are only valid for the constant internal fluid velocity cases. This is why the original IMB method gave correct results for the fixed particle cases 9 where the internal fluid velocity was always equal to zero.…”

Section: Internal Fluid Effectmentioning

confidence: 99%

“…8,9,19,20 According to the result in Reference [11], forces on the particle obtained by IMB are the smoothest among all the method they tested. During the past few decades, this model has been widely applied to explore the underlying physics of dense particles suspension, 14,[21][22][23][24][25][26][27][28][29][30] where thousands of particles immersed in the fluid were considered. IMB method was validated in the previous work by simulating the fluid flow through a fixed particle, 9 and the calculated drag coefficient agreed well with other numerical and empirical results.…”

Section: Introductionmentioning

confidence: 99%

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An improved immersed moving boundary for hydrodynamic force calculation in lattice Boltzmann method

Chen

Wang

2020

Numerical Meth Engineering

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Summary Particles suspension is considerably prevalent in petroleum industry and chemical engineering. The efficient and accurate simulation of such a process is always a challenge for both the traditional computational fluid dynamics and lattice Boltzmann method. Immersed moving boundary (IMB) method is promising to resolve this issue by introducing a particle‐fluid interaction term in the standard lattice Boltzmann equation, which allows for the smooth hydrodynamic force calculation even for a large grid size relative to the solid particle. Although the IMB method was proved good for stationary particles, the deviation of hydrodynamic force on moving particles exists. In this work, we reveal the physical origin of this problem first and figure out that the internal fluid effect on the hydrodynamic force calculation is not counted in the previous IMB. An improved immersed moving boundary method is therefore proposed by considering the internal fluid correction, which is easy to implement with the little extra computation cost. A 2D single elliptical particle and a 3D sphere sedimentation in Newtonian fluid is simulated directly for the validation of the corrected model by excellent agreements with the standard data.

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Section: Internal Fluid Effectmentioning

confidence: 99%