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S10 Fluidodināmica de Escoamento Multifįsico |
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Title:
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SURFACE TENSION IMPLEMENTATION FOR GENSMAC2D
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Summary :
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IN THE PRESENT WORK WE DESCRIBE A METHOD WHICH ALLOWS THE INCORPORATION OF
SURFACE TENSION INTO THE GENSMAC2D CODE. THIS IS ACHIEVED ON TWO SCALES.
FIRST ON THE SCALE OF A CELL, THE SURFACE TENSION EFFECTS ARE INCORPORATED
INTO THE FREE SURFACE BOUNDARY CONDITIONS THROUGH THE COMPUTATION OF
THE CAPILLARY PRESSURE. THE REQUIRED CURVATURE IS ESTIMATED BY FITTING A LEAST SQUARE CIRCLE TO THE FREE SURFACE USING THE TRACKING PARTICLES IN THE CELL AND IN ITS CLOSE NEIGHBORS. ON A SUB-CELL SCALE, SHORT WAVELENGTH PERTURBATIONS ARE FILTERED OUT USING A LOCAL 4-POINT STENCIL WHICH IS MASS CONSERVATIVE.
AN EFFICIENT IMPLEMENTATION IS OBTAINED THROUGH A DUAL REPRESENTATION OF THE
CELL DATA, USING BOTH A MATRIX REPRESENTATION, FOR EASE AT IDENTIFYING NEIGHBOURING CELLS, AND ALSO A TREE DATA STRUCTURE, WHICH PERMITS THE
REPRESENTATION OF SPECIFIC GROUPS OF CELLS WITH ADDITIONAL INFORMATION
PERTAINING TO THAT GROUP. THE RESULTING CODE IS SHOWN TO BE ROBUST, AND TO
PRODUCE ACCURATE RESULTS WHEN COMPARED WITH EXACT SOLUTIONS OF SELECTED FLUIDDYNAMIC PROBLEMS INVOLVING SURFACE TENSION. |
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Author :
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Castelo F., Antonio 0
Mangiavacchi, Norberto 0
McKee, Sean 0
Tome, Murilo Francisco
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Paper View :
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