Loading...

Numerical Modeling of Liquid Jet Breakup Using SPH Method

Pourabdian, Majid | 2014

1069 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46635 (45)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Morad , Mohammad Reza; Omidvar, Pourya
  7. Abstract:
  8. Smoothed Particle Hydrodynamics (SPH) is a numerical Lagrangian meshless method which has numerous applications in astrophysics, hydrodynamics, free-surface flows, jets and sprays formation. Atomization of continuum liquid to fine droplets or in other words, liquid breakup processes are emerged in many engineering applications such as fuel sprays inside the combustion chamber of internal combustion engines that sizes of produced sprays significantly influence the engine’s efficiency. This research is accomplished to investigate the one-phase and two-phase flows of liquid jet breakup. For this aim, an open source code called SPHysics which solves the flow field by SPH method is utilized. This code is limited to simulate one-phase free-surface flows. Therefore, to assure the performance of the code, a one-phase flow is simulated and afterwards, the serial two-dimensional SPHysics code is developed in two categories which are adding the surface tension effects and making a two-phase code. To verify the accuracy of the developed code, three two-phase test cases are simulated and the results are compared to analytical and numerical ones. Due to pressure instability trouble in the interface of two fluids with high density ratios such as air-water, two-phase water jet flow has not been simulated by SPH method so far. Hence, this problem is resolved by modifying the governing equations of the flow in this thesis. Eventually, liquid jet flow and its breakup behavior is investigated for one-phase and two-phase flows and liquid breakup length is computed in different conditions. The results are validated with experimental correlation
  9. Keywords:
  10. Smoothed Particle Hydrodynamics (SPH) ; Multiphase Flow ; Liquid Jet Breakup ; Breakup Length ; SPHysics Code

 Digital Object List

 Bookmark

No TOC