Turbulent momentum and heat transport in flow through a 180 deg bend of square crosssection
Abstract
The paper reports flow and heat transfer predictions of turbulent flow in passage around a 180 deg squaresectioned bend. The numerical results are obtained from a finitevolume discretization of the semielliptic form of the NavierStokes and energy equations. The turbulent stresses are represented by the kepsilon Boussinesq viscosity model both in its standard form and with a streamline curvature correction. Serious differences between experiment and prediction exist for both forms, and suggestions are made for their origin. Heat transfer computations indicate that from 45 deg  180 deg the secondary flow provokes at least a 2:1 circumfeerential variation in the heat transfer coefficient around the duct perimeter, and that differences of 40 percent between the mean heat transfer coefficient in each wall persist at least 10 diameters downstream.
 Publication:

4th Symposium on Turbulent Shear Flows
 Pub Date:
 1984
 Bibcode:
 1984stsf.proc....6C
 Keywords:

 Channel Flow;
 Computational Fluid Dynamics;
 Heat Transfer Coefficients;
 Turbulent Flow;
 Bending;
 Boundary Value Problems;
 Boussinesq Approximation;
 Differential Equations;
 Discrete Functions;
 Energy Transfer;
 Finite Difference Theory;
 KEpsilon Turbulence Model;
 NavierStokes Equation;
 Secondary Flow;
 Fluid Mechanics and Heat Transfer