Affiliation:
1. Engine Research Center, University of Wisconsin-Madison, Madison, WI 53706
Abstract
Abstract
Numerical grid and time-step dependencies of discrete droplet Lagrangian spray models are identified. The two main sources of grid dependency are due to errors in predicting the droplet-gas relative velocity and errors in describing droplet-droplet collision and coalescence processes. For reducing grid dependency due to the relative velocity effects, a gas-jet theory is proposed and applied to model diesel sprays. For the time-step dependency, it is identified that the collision submodel results in drop size variation in the standard spray model. A proposed spray model based on the gas-jet theory is found to improve the time-step independency also along with the mesh independency. The use of both Eulerian (collision mesh) and Lagrangian (radius of influence) collision models along with the gas-jet theory is found to provide mesh-independent results.
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference18 articles.
1. Amsden, A. A.
, 1997, “KIVA-3V: A Block Structured KIVA Program for Engines With Vertical or Canted Valves,” Los Alamos National Laboratory, Technical report No. LA-13313-MS.
2. Modeling Drop Interactions in Thick Sprays and a Comparison With Experiments;O’Rourke
3. O’Rourke, P. J.
, 1981, “Collective Drop Effects on Vaporizing Liquid Sprays,” Ph.D. Thesis, Princeton University.
4. Patterson, M. A., and Reitz, R. D., 1998, SAE Technical Paper No. 980131.
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