SR27  Transferência de Calor e Massa
 
 Titulo:
HEAT TRANSFER IN DEVELOPING FLOW OF VISCOPLASTIC MATERIALS THROUGH ANNULAR SPACES
 
Resumo :
HEAT TRANSFER IN THE ENTRANCE-REGION LAMINAR FLOW OF VISCOPLASTIC MATERIALS INSIDE ANNULAR SPACES IS ANALYZED, AIMING AT APPLICATIONS RELATED TO THE DRILLING PROCESS OF PETROLEUM WELLS. THE MATERIAL IS ASSUMED TO BEHAVE AS A GENERALIZED NEWTONIAN LIQUID, WITH A HERSCHEL-BULKLEY VISCOSITY FUNCTION. THE GOVERNING EQUATIONS ARE SOLVED NUMERICALLY VIA A FINITE VOLUME METHOD. TWO BOUNDARY CONDITIONS WERE ANALYZED: CONSTANT WALL HEAT FLUXES AND CONSTANT WALL TEMPERATURES. THE EFFECT OF YIELD STRESS AND POWER-LAW EXPONENT ON THE NUSSELT NUMBER IS INVESTIGATED. IT IS SHOWN THAT THE ENTRANCE LENGTH DECREASES AS THE MATERIAL BEHAVIOR DEPARTS FROM NEWTONIAN. 
 
Autores :
Naccache, Mônica Feijó
Soares, Edson José
Souza Mendes, Paulo Roberto
 
 
Trabalho Completo :

 

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