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NUMERICAL SIMULATIONS OF LIQUID JET BREAK UP IN A CROSSFLOW

Jain, Mohit and Tomar, Gaurav and Ravikrishna, RV and Prakash, Surya R and Raghunandan, BN (2013) NUMERICAL SIMULATIONS OF LIQUID JET BREAK UP IN A CROSSFLOW. In: UNSPECIFIED.

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Abstract

Atomization is the process of disintegration of a liquid jet into ligaments and subsequently into smaller droplets. A liquid jet injected from a circular orifice into cross flow of air undergoes atomization primarily due to the interaction of the two phases rather than an intrinsic break up. Direct numerical simulation of this process resolving the finest droplets is computationally very expensive and impractical. In the present study, we resort to multiscale modelling to reduce the computational cost. The primary break up of the liquid jet is simulated using Gerris, an open source code, which employs Volume-of-Fluid (VOF) algorithm. The smallest droplets formed during primary atomization are modeled as Lagrangian particles. This one-way coupling approach is validated with the help of the simple test case of tracking a particle in a Taylor-Green vortex. The temporal evolution of the liquid jet forming the spray is captured and the flattening of the cylindrical liquid column prior to breakup is observed. The size distribution of the resultant droplets is presented at different distances downstream from the location of injection and their spatial evolution is analyzed.

Item Type: Conference Proceedings
Additional Information: 2nd ASME Gas Turbine India Conference, Bangalore, INDIA, DEC 05-06, 2013
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 20 Apr 2015 06:20
Last Modified: 06 May 2015 09:25
URI: http://eprints.iisc.ac.in/id/eprint/51173

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