ADIABATIC SHEARING OF AN INCOMPRESSIBLE FLUID WITH TEMPERATURE-DEPENDENT VISCOSITY UNDER PERIODIC OR STEADY-BOUNDARY CONDITIONS

1985 ◽  
Vol 8 (4) ◽  
pp. 425-434 ◽  
Author(s):  
Nicolas Charalambakis
Keyword(s):  
Boundary Conditions ◽  
Incompressible Fluid ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Adiabatic Shearing ◽  
Dependent Viscosity

Entrance, Viscous Dissipation and Temperature Dependent Viscosity Effects in Microchannel Flows With Convective Boundary Conditions

2006 ◽  
Author(s):  
C. Nonino ◽  
S. Del Giudice ◽  
S. Savino
Keyword(s):  
Boundary Conditions ◽  
Viscous Dissipation ◽  
Circular Cross Section ◽  
Laminar Flows ◽  
Projection Algorithm ◽  
Convective Boundary Conditions ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Convective Boundary ◽  
Dependent Viscosity

The effects of viscous dissipation and temperature dependent viscosity in simultaneously developing laminar flows of liquids in straight microchannels of circular cross-section are studied with reference to convective boundary conditions. Viscosity is assumed to vary linearly with temperature, in order to allow a parametric investigation, while the other fluid properties are held constant. A finite element procedure, based on a projection algorithm, is employed for the step-by-step solution of the parabolized momentum and energy equations. Axial distributions of the local overall Nusselt number and of the apparent Fanning friction factor are presented with reference to both heating and cooling conditions for three different values of the Biot number. Examples of temperature profiles at different axial locations are also shown.

Effects of Temperature-Dependent Viscosity Variations and Boundary Conditions on Fully Developed Laminar Forced Convection in a Semicircular Duct

1998 ◽  
Vol 120 (3) ◽  
pp. 600-605 ◽  
Author(s):  
T. M. Harms ◽  
M. A. Jog ◽  
R. M. Manglik
Keyword(s):  
Boundary Conditions ◽  
Power Law ◽  
Numerical Solutions ◽  
Strong Dependence ◽  
Laminar Flows ◽  
Temperature Fields ◽  
Traditional Values ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Dependent Viscosity

Fully developed laminar flows in a semicircular duct with temperature-dependent viscosity variations in the flow cross section are analyzed, where the viscosity-temperature behavior is described by the Arrhenius model. Both the T and H1 boundary conditions are considered, as they represent the most fundamental heating/cooling conditions encountered in practical compact heat exchanger applications. Numerical solutions for the flow velocity and the temperature fields have been obtained by finite difference technique. The friction factor and Nusselt number results display a strong dependence on the viscosity ratio (μw/μb), and this is correlated using the classical power-law relationship. However, results indicate that the power-law exponents are significantly different from traditional values for circular tube. They are found to be functions of the flow geometry, boundary condition, and direction of heat transfer (heating or cooling).

On the turbulent couette flow of an incompressible fluid with temperature-dependent viscosity

Meccanica ◽  
1973 ◽  
Vol 8 (3) ◽  
pp. 168-173
Author(s):  
Gabriella Barsanti ◽  
Mario Ciampi ◽  
Sergio Faggiani ◽  
Giuseppe Tuoni
Keyword(s):  
Incompressible Fluid ◽  
Couette Flow ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Dependent Viscosity

scholarly journals Magneto Hydrodynamic Incompressible Laminar Flow With Temperature Dependent Viscosity Between Two Parallel Porous Walls

2019 ◽  
Keyword(s):  
Temperature Distribution ◽  
Laminar Flow ◽  
Incompressible Fluid ◽  
Energy Equation ◽  
Constant Pressure ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Porous Walls ◽  
Effects Of Temperature ◽  
Dependent Viscosity

This paper studied Magneto hydrodynamics viscious, incompressible fluid bounded by the parallel non-conducting porous walls. The viscousity of the fluid is assumed to be temperature dependent. The fluid is subjected to a constant pressure gradient and an external uniformmagnetic field perpendicular to the walls. The two walls are kept different but constant temperature while the Joule and viscious dissipation are included in the energy equation. Graphs were presented to show the effects of temperature depentent viscosity on both the velocity and temperature distribution.

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