TY - JOUR

T1 - Study of vortex breakdown in immiscible media using the lattice Boltzmann equations method

AU - Salnikov, M. V.

AU - Kinzin, K. S.

AU - Naumov, I. V.

AU - Mullyadzhanov, R. I.

N1 - Research was supported by RSF (Grant No. 19-19-00083). Computations were performed under the state assignment conditions at the “Cascade” computer cluster at the Institute of Thermophysics SB RAS. Публикация для корректировки.

PY - 2023/7

Y1 - 2023/7

N2 - Numerical simulation is performed for a cylinder-bound two-component liquid flow. Simulation model is based on the method of lattice Boltzmann equations. The collision integral in this model is defined from the MRT approximation. The interaction between liquid components is described by the diffusion interface model with the pseudopotential approximation. The main deficiency of this known approach is the disbalance of discrete forces of two-component interaction; this would generate a pseudo-current in the transition zone. The presented numerical study offers a qualitative view for the pseudopotential function providing a smallest value for intercomponent interaction coefficient. This means the low pseudo-currents and the smallest size for the diffusive transition. The example simulation is presented for a problem of rotation of two components in a cylinder. The simulation gives also the Reynolds number range and the cylinder aspect ratio that ensure the start of flow recirculation at the cylinder axis. It was demonstrated that simulation results comply with experimental data with a high accuracy.

AB - Numerical simulation is performed for a cylinder-bound two-component liquid flow. Simulation model is based on the method of lattice Boltzmann equations. The collision integral in this model is defined from the MRT approximation. The interaction between liquid components is described by the diffusion interface model with the pseudopotential approximation. The main deficiency of this known approach is the disbalance of discrete forces of two-component interaction; this would generate a pseudo-current in the transition zone. The presented numerical study offers a qualitative view for the pseudopotential function providing a smallest value for intercomponent interaction coefficient. This means the low pseudo-currents and the smallest size for the diffusive transition. The example simulation is presented for a problem of rotation of two components in a cylinder. The simulation gives also the Reynolds number range and the cylinder aspect ratio that ensure the start of flow recirculation at the cylinder axis. It was demonstrated that simulation results comply with experimental data with a high accuracy.

KW - LBM

KW - lattice Boltzmann methods

KW - multicomponent liquid

KW - swirl flow

KW - vortex breakdown

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85181241040&origin=inward&txGid=b7836b098624b734e9f8d69003d12e3d

UR - https://www.mendeley.com/catalogue/64cd25e3-5e18-3a4f-833b-d0397292ad28/

U2 - 10.1134/S0869864323040017

DO - 10.1134/S0869864323040017

M3 - Article

VL - 30

SP - 601

EP - 614

JO - Thermophysics and Aeromechanics

JF - Thermophysics and Aeromechanics

SN - 0869-8643

IS - 4

ER -