Finite Element Solutions for Non-Newtonian Pulsatile Flow in a Non-Darcian Porous Medium Conduit

• Main Authors: R. Bhargava, H. S. Takhar, S. Rawat, Tasveer A. Bég, O. Anwar Bég
• Format: Article
• Language: English
• Published: Vilnius University Press 2007-07-01
• Series: Nonlinear Analysis
• Subjects: hydromechanics; pulsatile; rheological; non-Darcian porous medium; finite element solution; Reynolds number
• Online Access: http://www.zurnalai.vu.lt/nonlinear-analysis/article/view/14690

The present analysis is motivated by the need to elucidate with more accuracy and sophistication the hydrodynamics of non-Newtonian flow via a channel containing a porous material under pulsating pressure gradient. A one-dimensional transient rheological model for pulsating flow through a Darcy-Forcheimmer porous channel is used. A modified Casson non-Newtonian constitutive model is employed for the transport fluid with a drag force formulation for the porous body force effects. The model is transformed and solved using a finite element numerical technique. Rheological effects are examined using a β parameter which vanishes in the limit (Newtonian flow). Velocity profiles are plotted for studying the influence of Reynolds number, Darcy number, Forchheimer number and the β (non-Newtonian) parameter. The channel considered is rigid with a pulsatile pressure applied via an appropriate pressure gradient term. The model finds applications in industrial filtration systems, pumping of polymeric fluids etc.