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.

LATTICE BOLTZMANN SIMULATION OF DEFORMABLE MEMBRANE IN FLUID

2003 ◽  
Vol 17 (01n02) ◽  
pp. 149-152
Author(s):  
HUABING LI ◽  
HAIPING FANG ◽  
ZHIFANG LIN
Keyword(s):  
Numerical Simulation ◽  
Lattice Boltzmann ◽  
Transient State ◽  
Critical Value ◽  
Two Dimensional ◽  
Membrane Tension ◽  
Soft Or ◽  
Lattice Boltzmann Simulation ◽  
Deformable Membrane ◽  
Boltzmann Method

A lattice Boltzmann method is proposed to simulate the two-dimensional membrane. Numerical simulation shows that at a critical value of membrane tension, the pattern of the membrane at transient state behaves like a standing wave with a node staying at rest. In addition, when the membrane is relatively soft or stiff, it will evolve into a steady-state close to its initial straight pattern.

scholarly journals Multi-component Lattice Boltzmann simulation of the hydrodynamics in drip emitters

2017 ◽  
Vol 48 (3) ◽  
pp. 175
Author(s):  
Giacomo Falcucci ◽  
Vesselin K. Krastev ◽  
Chiara Biscarini
Keyword(s):  
Experimental Data ◽  
Lattice Boltzmann ◽  
Numerical Technique ◽  
Simulation Tool ◽  
Irrigation Systems ◽  
Lattice Boltzmann Simulation ◽  
Proposed Model ◽  
Flow Through ◽  
Boltzmann Method ◽  
Good Agreement

In this paper, we propose a fast and efficient numerical technique based on the Lattice Boltzmann method (LBM) to model the flow through a reference drip emitter geometry. The aim of the study is to demonstrate the applicability of the LBM as a reliable simulation tool for the hydraulic optimisation of irrigation systems. Results for the water flow through a rectangular drip emitter are in good agreement with literature numerical and experimental data. Furthermore, we demonstrate the feasibility of the proposed model to simulate a multi-component flow that could be used to simulate the presence of additives, contaminants, and suspended particles.

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