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S10 Fluidodinâmica de Escoamento Multifásico |
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Title:
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NUMERICAL INVESTIGATION OF THE ASCENSION OF GAS BUBBLES IN AN INFINITE LIQUID MEDIUM
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Summary :
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ABSTRACT. THIS WORK REPORTS THE RESULTS OF A NUMERICAL INVESTIGATION OF THE FLOW AROUND SPHERICAL GAS BUBBLES WITH TERMINAL RISING SPEED, AS WELL AS THE DETERMINATION OF SOME DIMENSIONLESS PARAMETERS (E.G., REYNOLDS NUMBERS, DRAG COEFFICIENTS, ETC) THAT CHARACTERIZE THIS TYPE OF FLOW. TO OBTAIN THE SOLUTION OF THE PROBLEM, THE AUTHORS USED A COMPUTATIONAL PROGRAM THAT SOLVES THE NON-LINEAR NAVIER-STOKES PARTIAL DIFFERENTIAL EQUATIONS (PDE S) AND THE CONTINUITY EQUATION (PRESSURE EQUATION) USING THE FINITE ELEMENT METHOD. SIMULTANEOUSLY, THE STREAM FUNCTION EQUATION WAS SOLVED TO VISUALIZE THE FLOW AROUND THE BUBBLE. FINALLY, THE NUMERICAL RESULTS FOR THE GAS BUBBLES WERE COMPARED WITH THE DATA PREVIOUSLY OBTAINED BY THE AUTHORS FOR INVISCID BUBBLES AND FOR RIGID SPHERES AND WITH OTHER RESULTS OF THE SPECIFIC LITERATURE.
KEYWORDS: GAS BUBBLE, TWO-PHASE FLOW, DRAG COEFFICIENT
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Author :
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MANSUR, SÉRGIO SAID
PANTALEÃO, ALUISIO VIAIS
VIEiRA, EDSON DEL RIO
ZAPAROLI, EDSON LUIZ
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