Dual grid level set method based direct numerical simulations of nucleate boiling with oscillating base plate

2021 ◽  
Vol 162 ◽  
pp. 106785
Author(s):  
Harshal S. Raut ◽  
Amitabh Bhattacharya ◽  
Atul Sharma
Keyword(s):  
Numerical Simulations ◽  
Level Set Method ◽  
Level Set ◽  
Base Plate ◽  
Nucleate Boiling ◽  
Direct Numerical Simulations ◽  
Grid Level

Modeling Wall Film Formation and Breakup Using an Integrated Interface-Tracking/Discrete-Phase Approach

2010 ◽  
Vol 133 (3) ◽  
Author(s):  
M. Arienti ◽  
L. Wang ◽  
M. Corn ◽  
X. Li ◽  
M. C. Soteriou ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Level Set ◽  
Film Formation ◽  
Rectangular Channel ◽  
Grid Method ◽  
Direct Numerical Simulations ◽  
Liquid Jet ◽  
Two Phase ◽  
Local Flow ◽  
Air Jet

We propose a computationally tractable model for film formation and breakup based on data from experiments and direct numerical simulations. This work is a natural continuation of previous studies where primary atomization was modeled based on local flow information from a relatively low-resolution tracking of the liquid interface [Arienti and Soteriou, 2007, “Dynamics of Pulsed Jet in Crossflow,” ASME Paper No. GT2007-27816]. The submodels for film formation proposed here are supported by direct numerical simulations obtained with the refined level set grid method [Herrmann, 2008, “A Balanced Force Refined Level Set Grid Method for Two-Phase Flows on Unstructured Flow Solver Grids,” J. Comput. Phys., 227, pp. 2674–2706]. The overall approach is validated by a carefully designed experiment [Shedd et. al., 2009, “Liquid Jet Breakup by an Impinging Air Jet,” Forty-Seventh AIAA Aerospace Sciences Meeting. Paper No. AIAA-2009-0998], where the liquid jet is crossflow-atomized in a rectangular channel so that a film forms on the wall opposite to the injection orifice. The film eventually breaks up at the downstream exit of the channel. Comparisons with phase Doppler particle analyzer data and with nonintrusive film thickness point measurements complete this study.

Direct Numerical Simulations of Nucleate Boiling

2008 ◽  
Author(s):  
Gretar Tryggvason ◽  
Siju Thomas ◽  
Jiacai Lu
Keyword(s):  
Numerical Simulations ◽  
Time Scales ◽  
Nucleate Boiling ◽  
Unsteady Motion ◽  
Direct Numerical Simulations ◽  
Disperse Flow ◽  
Fluid Mixture ◽  
Fluid Systems ◽  
Two Fluid ◽  
New Algorithms

Direct Numerical Simulations (DNS) of multiphase flows, where all continuum length and time scales are fully resolved have progressed enormously in the last few years. Increases in computer power and new algorithms now make it possible to follow the unsteady motion of several hundred particles (drops, bubbles and solids) for long enough times so that meaningful averages for the fluid mixture can be calculated. However, most progress has so far been made for disperse flow of two-fluid systems. See Prosperetti and Tryggvason (2007) for a review.

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