Nonisothermal flow induced by the squeezing of a non-Newtonian fluid film between two parallel plates

1980 ◽  
Vol 21 (2) ◽  
pp. 215-219 ◽  
Author(s):  
Yu. V. Kazankov ◽  
V. E. Pervushin
Keyword(s):  
Newtonian Fluid ◽  
Fluid Film ◽  
Nonisothermal Flow ◽  
Parallel Plates

Magnetohydrodynamic Squeeze Film Characteristics Between Parallel Circular Plates Containing a Single Central Air Bubble in the Inertial Flow Regime

1999 ◽  
Vol 66 (4) ◽  
pp. 1021-1023 ◽  
Author(s):  
R. Usha ◽  
P. Vimala
Keyword(s):  
Magnetic Field ◽  
Differential Equation ◽  
Nonlinear Differential Equation ◽  
Bubble Radius ◽  
Fluid Film ◽  
Squeeze Film ◽  
Parallel Plates ◽  
Circular Plates ◽  
Air Bubble ◽  
Approximate Analytical Solutions

In this paper, the magnetic effects on the Newtonian squeeze film between two circular parallel plates, containing a single central air bubble of cylindrical shape are theoretically investigated. A uniform magnetic field is applied perpendicular to the circular plates, which are in sinusoidal relative motion, and fluid film inertia effects are included in the analysis. Assuming an ideal gas under isothermal condition for an air bubble, a nonlinear differential equation for the bubble radius is obtained by approximating the momentum equation governing the magnetohydrodynamic squeeze film by the mean value averaged across the film thickness. Approximate analytical solutions for the air bubble radius, pressure distribution, and squeeze film force are determined by a perturbation method for small amplitude of sinusoidal motion and are compared with the numerical solution obtained by solving the nonlinear differential equation. The combined effects of air bubble, fluid film inertia, and magnetic field on the squeeze film force are analyzed.

Heat Transfer and Entropy Generation Characteristics of a Non-Newtonian Fluid Squeezed and Extruded Between Two Parallel Plates

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
P Kaushik ◽  
Pranab Kumar Mondal ◽  
Sukumar Pati ◽  
Suman Chakraborty
Keyword(s):  
Heat Transfer ◽  
Newtonian Fluid ◽  
Entropy Generation ◽  
Bejan Number ◽  
Engineering Systems ◽  
Power Law Model ◽  
Parallel Plates ◽  
Unsteady Heat Transfer ◽  
Thermodynamic Performance ◽  
Fluid Rheology

This study investigates the unsteady heat transfer and entropy generation characteristics of a non-Newtonian fluid, squeezed and extruded between two parallel plates. In an effort to capture the underlying thermo-hydrodynamics, the power-law model is used here to describe the constitutive behavior of the non-Newtonian fluid. The results obtained from the present analysis reveal the intricate interplay between the fluid rheology and the squeezing dynamics, toward altering the Nusselt number and Bejan number characteristics. Findings from this study may be utilized to design optimal process parameters for enhanced thermodynamic performance of engineering systems handling complex fluids undergoing simultaneous extrusion and squeezing.

Numerical analysis of natural convection for non-Newtonian fluid conveying nanoparticles between two vertical parallel plates

2015 ◽  
Vol 130 (12) ◽  
Author(s):  
S. A. R. Sahebi ◽  
H. Pourziaei ◽  
A. R. Feizi ◽  
M. H. Taheri ◽  
Y. Rostamiyan ◽  
...  
Keyword(s):  
Natural Convection ◽  
Numerical Analysis ◽  
Newtonian Fluid ◽  
Parallel Plates

scholarly journals A Graphical Technique for Solving the Couette-Poiseuille Problem for Generalized Newtonian Fluids

2018 ◽  
Vol 63 (1) ◽  
pp. 200-209
Author(s):  
Péter Nagy-György ◽  
Csaba Hős
Keyword(s):  
Newtonian Fluid ◽  
Parallel Plates ◽  
Generalized Newtonian Fluid ◽  
Viscosity Function ◽  
Local Shear ◽  
Graphical Technique ◽  
Profile Flow ◽  
Primary Variable ◽  
Fluid Rheology ◽  
Local Shear Stress

This paper addresses the mixed Couette-Poiseuille problem, that is the flow between two parallel plates, in the presence of simultaneous pressure gradient and wall motion. Instead of the wall-normal coordinate y, we use the local shear stress as our primary variable and rewrite the corresponding formulae for the velocity profile, flow rate, etc. This gives rise to a graphical technique for solving the problem in the case of arbitrary (possibly measured) generalized Newtonian fluid rheology. We demonstrate the use of the proposed technique on two problems: (a) Bingham fluid and (b) a non-Newtonian fluid with general, nonmonotonous viscosity function.

scholarly journals The Dynamic Compressive Response of an Open-Cell Foam Impregnated With a Non-Newtonian Fluid

2009 ◽  
Vol 76 (6) ◽  
Author(s):  
M. A. Dawson ◽  
G. H. McKinley ◽  
L. J. Gibson
Keyword(s):  
Newtonian Fluid ◽  
Colloidal Silica ◽  
Dynamic Compression ◽  
Shear Thickening ◽  
Local Strain ◽  
Strain Rates ◽  
Parallel Plates ◽  
Compressive Response ◽  
Instantaneous Strain ◽  
Open Cell Foam

The response of a reticulated, elastomeric foam filled with colloidal silica under dynamic compression is studied. Under compression beyond local strain rates on the order of 1 s−1, the non-Newtonian, colloidal silica-based fluid undergoes dramatic shear thickening and then proceeds to shear thinning. In this regime, the viscosity of the fluid is large enough that the contribution of the foam and the fluid-structure interaction to the stress response of the fluid-filled foam can be neglected. An analytically tractable lubrication model for the stress-strain response of a non-Newtonian fluid-filled, reticulated, elastomeric foam under dynamic compression between two parallel plates at varying instantaneous strain rates is developed. The resulting lubrication model is applicable when the dimension of the foam in the direction of fluid flow (radial) is much greater than that in the direction of loading (axial). The model is found to describe experimental data well for a range of radius to height ratios (∼1–4) and instantaneous strain rates of the foam (1 s−1 to 4×102 s−1). The applicability of this model is discussed and the range of instantaneous strain rates of the foam over which it is valid is presented. Furthermore, the utility of this model is discussed with respect to the design and development of energy absorption and blast wave protection equipment.

Thermal and squeezing effects in non-newtonian fluid film lubrication of rollers

Wear ◽  
1987 ◽  
Vol 119 (2) ◽  
pp. 175-190 ◽  
Author(s):  
Dhaneshwar Prasad ◽  
Punyatma Singh ◽  
Prawal Sinha
Keyword(s):  
Newtonian Fluid ◽  
Fluid Film ◽  
Film Lubrication ◽  
Fluid Film Lubrication
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