NUMERICAL INVESTIGATION OF VARIOUS SPRAY BREAKUP AND DROPLET COLLISION MODELS IN THE MODELING OF IN-CYLINDER FUEL SPRAY

2012 ◽  
Vol 22 (10) ◽  
pp. 843-860
Author(s):  
Reza Kamali ◽  
M. Mofarrahi
Keyword(s):  
Numerical Investigation ◽  
Fuel Spray ◽  
Droplet Collision ◽  
Collision Models

Numerical Investigation on Primary Atomization of the Fuel Spray in Diesel Engines

2012 ◽  
Vol 516-517 ◽  
pp. 634-637
Author(s):  
Zhi Xia He ◽  
Li Li Tian ◽  
Ju Yan Liu
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Investigation ◽  
Diesel Engines ◽  
Fuel Spray ◽  
New Model ◽  
Turbulence Flow ◽  
Primary Breakup ◽  
Simulation Results ◽  
Breakup Model

In addition to the aerodynamic effects, turbulence and cavitation play an important role on the primary atomization. Different spray breakup models were analysized and evaluated though simulation of spray with them and then a new model of coupling the nozzle cavitating and turbulence flow to the spray primary breakup was put forward. The numerical simulation results with all these different spray primary breakup models were comparied with the experimental data and then the new model were proved to be much better. The study may effectively help establish the accurate spray breakup model.

Reducing Grid Dependency in Droplet Collision Modeling

2004 ◽  
Vol 126 (2) ◽  
pp. 227-233 ◽  
Author(s):  
David P. Schmidt ◽  
Christopher J. Rutland
Keyword(s):  
Drop Size ◽  
Predictive Ability ◽  
Sampling Technique ◽  
Physical Models ◽  
New Method ◽  
Droplet Collision ◽  
Numerical Errors ◽  
Mesh Dependency ◽  
Average Drop ◽  
Collision Models

Droplet collision models have been criticized for creating large mesh dependency in spray calculations. These numerical errors are very troublesome; they behave erratically and interfere with the predictive ability of physical models. The collision method used in KIVA can cause mesh dependent changes in average drop size of over 40 microns. In order to reduce mesh dependency, a new method has been developed for calculating the incidence of collision. The solution is to create a special collision mesh that is optimized for accuracy. The mesh is created automatically during the spray calculation. Additionally, a different stochastic collision sampling technique is also used. The new method, called the NTC algorithm, was incorporated into KIVA and found to be much faster than older algorithms. Calculations with 60,000 parcels required only a few CPU minutes. With the new NTC method and collision mesh, the mesh dependence of the drop size is only nine microns. This remaining mesh dependency is found to be due to the drag calculations and is not the fault of the collision algorithm.

Ducted Fuel Injection: Experimental and numerical investigation on fuel spray characteristics, air/fuel mixing and soot mitigation potential

Fuel ◽  
2021 ◽  
Vol 289 ◽  
pp. 119835
Author(s):  
F. Millo ◽  
A. Piano ◽  
B. Peiretti Paradisi ◽  
L. Postrioti ◽  
L. Pieracci ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Fuel Injection ◽  
Fuel Spray ◽  
Spray Characteristics ◽  
Mitigation Potential ◽  
Fuel Mixing

Study on separation abilities of moisture separators based on droplet collision models

2017 ◽  
Vol 325 ◽  
pp. 135-148 ◽  
Author(s):  
Huang Zhang ◽  
Yuzheng Li ◽  
Jianxin Li ◽  
Qianfeng Liu
Keyword(s):  
Droplet Collision ◽  
Collision Models

The Computational Cost and Accuracy of Spray Droplet Collision Models

2019 ◽  
Author(s):  
Arpit Agarwal ◽  
Yue Wang ◽  
Long Liang ◽  
Chitralkumar Naik ◽  
Ellen Meeks
Keyword(s):  
Computational Cost ◽  
Spray Droplet ◽  
Droplet Collision ◽  
Collision Models
Sign in / Sign up

Export Citation Format

Share Document