scholarly journals Effect of Shear on Droplets in a Binary Mixture

1997 ◽  
Vol 08 (04) ◽  
pp. 773-782 ◽  
Author(s):  
Alexander J. Wagner ◽  
J. M. Yeomans
Keyword(s):  
Shear Flow ◽  
Binary Mixture ◽  
Lattice Boltzmann ◽  
Dynamic Equilibrium ◽  
Lattice Boltzmann Simulation ◽  
Break Up

In this article we use a lattice-Boltzmann simulation to examine the effects of shear flow on an equilibrium droplet in a phase separated binary mixture. We find that large drops break up as the shear is increased but small drops dissolve. We also show how the tip-streaming, observed for deformed drops, leads to a state of dynamic equilibrium.

Lattice Boltzmann Simulation of Cavitating Flows

2013 ◽  
Vol 13 (3) ◽  
pp. 685-695 ◽  
Author(s):  
Giacomo Falcucci ◽  
Stefano Ubertini ◽  
Gino Bella ◽  
Sauro Succi
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Equation Of State ◽  
Lattice Boltzmann ◽  
Fluid Dynamic ◽  
Cavitating Flows ◽  
Lattice Boltzmann Simulation ◽  
Break Up ◽  
Multi Phase ◽  
Boltzmann Method

AbstractThe onset of cavitating conditions inside the nozzle of liquid injectors is known to play a major role on spray characteristics, especially on jet penetration and break-up. In this work, we present a Direct Numerical Simulation (DNS) based on the Lattice Boltzmann Method (LBM) to study the fluid dynamic field inside the nozzle of a cavitating injector. The formation of the cavitating region is determined via a multi-phase approach based on the Shan-Chen equation of state. The results obtained by the LBM simulation show satisfactory agreement with both numerical and experimental data. In addition, numerical evidence of bubble break-up, following upon flow-induced cavitation, is also reported.

scholarly journals Lattice boltzmann simulation of boiling heat transfer in a shear flow

2020 ◽  
Vol 24 (Suppl. 1) ◽  
pp. 277-284
Author(s):  
Xiaopeng Shan ◽  
Geng Guan ◽  
Deming Nie
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Shear Flow ◽  
Lattice Boltzmann ◽  
Abnormal Behavior ◽  
Heated Plate ◽  
Two Phase ◽  
Average Heat ◽  
Lattice Boltzmann Simulation ◽  
Flow Features

In this work a two-phase lattice Boltzmann method was used to numerically study the behavior of liquid-vapor phase change induced by a heated plate under the action of shearing. The effects of the action of shearing on the bubble growth and departure were investigated in terms of the flow features, the average heat flux and the bubble releasing period. It is shown that the shear flow significantly enhances the heat transfer of the system in two respects: increasing the average heat flux and decreasing the bubble releasing period. The effects of the intensity of the shear flow and the gravity force on the bubble releasing period were examined as well. The most striking finding is that there exists a sudden jump in the period at a critical shear intensity of the flow. The reason behind this abnormal behavior is that the residual part of bubble is nearly condensed after the bulk of bubble departs from the heated plate.

scholarly journals Lattice boltzmann simulation of boiling heat transfer in a shear flow

2020 ◽  
Vol 24 (Suppl. 1) ◽  
pp. 277-284
Author(s):  
Xiaopeng Shan ◽  
Geng Guan ◽  
Deming Nie
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Shear Flow ◽  
Lattice Boltzmann ◽  
Abnormal Behavior ◽  
Heated Plate ◽  
Two Phase ◽  
Average Heat ◽  
Lattice Boltzmann Simulation ◽  
Flow Features

In this work a two-phase lattice Boltzmann method was used to numerically study the behavior of liquid-vapor phase change induced by a heated plate under the action of shearing. The effects of the action of shearing on the bubble growth and departure were investigated in terms of the flow features, the average heat flux and the bubble releasing period. It is shown that the shear flow significantly enhances the heat transfer of the system in two respects: increasing the average heat flux and decreasing the bubble releasing period. The effects of the intensity of the shear flow and the gravity force on the bubble releasing period were examined as well. The most striking finding is that there exists a sudden jump in the period at a critical shear intensity of the flow. The reason behind this abnormal behavior is that the residual part of bubble is nearly condensed after the bulk of bubble departs from the heated plate.

Lattice-Boltzmann Simulation of Particle Suspensions in Shear Flow

2005 ◽  
Vol 121 (1-2) ◽  
pp. 149-161 ◽  
Author(s):  
J. Hyväluoma ◽  
P. Raiskinmäki ◽  
A. Koponen ◽  
M. Kataja ◽  
J. Timonen
Keyword(s):  
Shear Flow ◽  
Lattice Boltzmann ◽  
Particle Suspensions ◽  
Lattice Boltzmann Simulation
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