| |
|
SR27 Transferência de Calor e Massa |
| |
|
Title:
|
HEAT TRANSFER IN DEVELOPING FLOW OF VISCOPLASTIC MATERIALS THROUGH ANNULAR SPACES
|
| |
|
Summary :
|
|
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. |
| |
|
Author :
|
Naccache, Mônica Feijó
Soares, Edson José
Souza Mendes, Paulo Roberto
|
| |
|
Paper View :
|
|
