Lattice Boltzmann Simulation of Cavitating Flows
Giacomo Falcucci 1*, Stefano Ubertini 2, Gino Bella 3, Sauro Succi 41 Department of Technologies, University of Naples "Parthenope", Centro Direzionale - Isola C4, 80143 Naples, Italy.
2 DEIM - Industrial Engineering School, University of Tuscia, Largo dell'Universita s.n.c., 01100, Viterbo, Italy.
3 Department of Mechanical Engineering, University of "Tor Vergata'', Viale Politecnico, Rome, Italy.
4 Istituto per le Applicazioni del Calcolo - CNR, Via dei Taurini, 00100 Roma, Italy.
Received 29 October 2011; Accepted (in revised version) 27 January 2012
Available online 29 August 2012
The 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.
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PACS: 47.11.-j, 47.65.Cb
Key words: Lattice Boltzmann, multiphase flows, cavitation, liquid spray, nozzle.
Email: firstname.lastname@example.org (G. Falcucci), email@example.com (S. Ubertini), firstname.lastname@example.org (G. Bella), email@example.com (S. Succi)