| |
|
S4 Ciências e Engenharia do Petróleo |
| |
|
Titulo:
|
SIMULATION OF TURBULENT HEAT TRANSFER IN POROUS MEDIA USING A SPATIALLY PERIODIC CELL AND THE K-EPSILON MODEL
|
| |
|
Resumo :
|
|
ABSTRACT. A SPATIALLY PERIODIC ARRAY IS USED TO SIMULATE THE FLOW FIELD INSIDE THE ELEMENTARY CONTROL VOLUME REPRESENTING A POROUS MEDIUM. FOR SIMPLICITY, TWO-DIMENSIONAL GEOMETRY IS CONSIDERED. BOUNDARY TREATMENT INCLUDES SYMMETRY LINES AND SPATIALLY PERIODIC CONDITIONS AS WELL AS PRESCRIBED TEMPERATURES OR HEAT FLUXES AT THE WALLS. THIS ARRANGEMENT IS AIMED AT THE ANALYSIS OF THE MEDIUM REPRESENTATIVE CELL IN ORDER TO GIVE INSIGHT TO THE MACROSCOPIC TREATMENT OF FLOW IN POROUS MEDIA. A GENERALIZED COORDINATE SYSTEM IS USED TO GENERATE THE GRID INSIDE THE COMPUTATIONAL DOMAIN. SOLUTION OF THE FLOW EQUATIONS IS OBTAINED WITH THE SIMPLE METHOD. THE VALUE OF MEDIUM POROSITY IS VARIED AND THE ANALYSIS COVERS A BROAD RANGE OF REYNOLDS NUMBER. THE ENERGY EQUATION CONSIDERS NO SOURCE TERM AND WALL PROXIMITY IS HANDLED BY MEANS OF THE WALL-FUNCTION OF KADER AND YAGLOM (1972). TEMPERATURE PATTERN AND CELL NUSSELT NUMBER ARE REPORTED.
KEY-WORDS: POROUS MEDIA, HEAT TRANSFER, GENERALIZED COORDINATES, TURBULENCE MODELING
|
| |
|
Autores :
|
de Lemos, Marcelo J. S.
Rocamora Jr., Francisco Dias
|
| |
|
Trabalho Completo :
|
|
