ORCID Profile
0000-0002-1554-1083
Current Organisation
UNSW Sydney
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Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 09-2016
Publisher: MDPI AG
Date: 21-05-2020
DOI: 10.3390/S20102910
Abstract: The present paper aims to investigate the influence of perforated membrane geometry on the performance of biosensors. For this purpose, a 2-D axisymmetric model of an erometric biosensor is analyzed. The governing equations describing the reaction-diffusion equations containing a nonlinear term related to the Michaelis–Menten kinetics of the enzymatic reaction are introduced. The partial differential governing equations, along with the boundary conditions, are first non-dimensionalized by using appropriate dimensionless variables and then solved in a non-uniform unstructured grid by employing the Galerkin Finite Element Method. To examine the impact of the hole-geometry of the perforated membrane, seven different geometries—including cylindrical, upward circular cone, downward circular cone, upward paraboloid, downward paraboloid, upward concave paraboloid, and downward concave paraboloid—are studied. Moreover, the effects of the perforation level of the perforated membrane, the filling level of the enzyme on the transient and steady-state current of the biosensor, and the half-time response are presented. The results of the simulations show that the transient and steady-state current of the biosensor are affected by the geometry dramatically. Thus, the sensitivity of the biosensor can be influenced by different hole-geometries. The minimum and maximum output current can be obtained from the cylindrical and upward concave paraboloid holes. On the other hand, the least half-time response of the biosensor can be obtained in the cylindrical geometry.
Publisher: Elsevier BV
Date: 11-2019
Publisher: Elsevier BV
Date: 08-2020
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 12-2018
Publisher: Elsevier BV
Date: 02-2019
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 02-2020
Publisher: Elsevier BV
Date: 07-2021
Publisher: Elsevier BV
Date: 07-2020
Publisher: MDPI AG
Date: 12-01-2021
DOI: 10.3390/SYM13010122
Abstract: The present paper aims to analyze the thermal convective heat transport and generated irreversibility of water-Cu-Al2O3 hybrid nanosuspension in an odd-shaped cavity. The side walls are adiabatic, and the internal and external borders of the enclosure are isothermally kept at high and low temperatures of Thand Tc, respectively. The control equations based on conservation laws are formulated in dimensionless form and worked out employing the Galerkin finite element technique. The outcomes are demonstrated using streamlines, isothermal lines, heatlines, isolines of Bejan number, as well as the rate of generated entropy and the Nusselt number. Impacts of the Rayleigh number, the hybrid nanoparticles concentration (ϕhnf), the volume fraction of the Cu nanoparticles to ϕhnf ratio (ϕr), width ratio (WR) have been surveyed and discussed. The results show that, for all magnitudes of Rayleigh numbers, increasing nanoparticles concentration intensifies the rate of entropy generation. Moreover, for high Rayleigh numbers, increasing WR enhances the rate of heat transport.
Publisher: Elsevier BV
Date: 08-2020
Location: Iran (Islamic Republic of)
No related grants have been discovered for Seyed Mohsen Hashem Zadeh.