Comment on the paper "Network and Nakamura tridiagonal computational simulation of electrically-conducting biopolymer micro-morphic transport phenomena O. Anwar Bég, J. Zueco, M. Norouzi, M. Davoodi, A. A. Joneidi, Assma F. Elsayed, Computers in Biology and Medicine 44 (2014) 44-56"
The present comment concerns some doubtful results included in the above paper.
Network and Nakamura tridiagonal computational simulation of electrically-conducting biopolymer micro-morphic transport phenomena
Magnetic fields have been shown to achieve excellent fabrication control and manipulation of conductive bio-polymer characteristics. To simulate magnetohydrodynamic effects on non-Newtonian electro-conductive bio-polymers (ECBPs) we present herein a theoretical and numerical simulation of free convection magneto-micropolar biopolymer flow over a horizontal circular cylinder (an "enrobing" problem). Eringen's robust micropolar model (a special case of the more general micro-morphic or "microfluid" model) is implemented. The transformed partial differential conservation equations are solved numerically with a powerful and new code based on NSM (Network Simulation Method) i.e. PSPICE. An extensive range of Hartmann numbers, Grashof numbers, micropolar parameters and Prandtl numbers are considered. Excellent validation is also achieved with earlier non-magnetic studies. Furthermore the present PSPICE code is also benchmarked with an implicit tridiagonal solver based on Nakamura's method (BIONAK) again achieving close correlation. The study highlights the excellent potential of both numerical methods described in simulating nonlinear biopolymer micro-structural flows.
Application of network thermodynamics to the computer modelling of nonstationary diffusion through heterogeneous membranes
Abstract Nonstationary diffusion through multilayer membranes has been studied using network thermodynamics together with the electrical circuit simulation routine, SPICE. A network model for a system made up of a multilayer membrane between two external phases is proposed. The concentration profiles in the composite membrane and the decay of the osmotic pressure across various associations (bi- and multilayer) of individual membranes connected in series has been simulated and calculated, thus doing away with the need for highly complex mathematical resolutions of the differential diffusion equations. The effect that a rearrangement of the spatial order of these membranes has on both the osmotic pressure and the activity profile is commented upon.