نتایج جستجو برای: Reactants distribution

تعداد نتایج: 612444  

In order to present a new and high performance structure of PEM fuel cell and study the influence of the flow direction and distribution on the rate of reactants diffusion, three novel models of vertical reactant flow injection into the anode and cathode reaction area field have been introduced. They consist of one inlet and two inlets and also a continuous channel. The governing equations on t...

Journal: :iranian journal of hydrogen and fuel cell 0
farzin ramin faculty of mechanical engineering, university of tabriz sima baheri islami faculty of mechanical engineering, university of tabriz siamak hossainpour mechanical engineering faculty, sahand university of technology

in order to present a new and high performance structure of pem fuel cell and study the influence of the flow direction and distribution on the rate of reactants diffusion, three novel models of vertical reactant flow injection into the anode and cathode reaction area field have been introduced. they consist of one inlet and two inlets and also a continuous channel. the governing equations on t...

1993
Satya N. Majumdar Vladimir Privman

Two-particle annihilation reaction, A+A → inert, for immobile reactants on the Bethe lattice is solved exactly for the initially random distribution. The process reaches an absorbing state in which no nearest-neighbor reactants are left. The approach of the concentration to the limiting value is exponential. The solution reproduces the known one-dimensional result which is further extended to t...

Journal: :international journal of nanoscience and nanotechnology 2007
sh. jamali e. saievar-iranizad s. farjami shayesteh

cadmium sulfide nanoparticles were grown using wet chemical method by dissolving the reactants ofcadmium acetate and sodium sulfide in the presence of thioglycerol (tg) as capping agent in ethanolsolvent. different nanoparticle sizes and size distribution were obtained through varying the molaritiesof thioglycerol. at higher tg concentration, synthesis provides a nearly monodisperse nanoparticl...

E. Saievar-Iranizad S. Farjami Shayesteh Sh. Jamali

Cadmium sulfide nanoparticles were grown using wet chemical method by dissolving the reactants of cadmium acetate and sodium sulfide in the presence of thioglycerol (TG) as capping agent in ethanol solvent. Different nanoparticle sizes and size distribution were obtained through varying the molarities of thioglycerol. At higher TG concentration, synthesis provides a nearly monodisperse nanopart...

Journal: :Journal of Oral Research and Review 2016

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2009
Atsushi Kamimura Hans J Herrmann Nobuyasu Ito

A power-law distribution is found in the density profile of reacting systems A+B-->C+D and 2A-->2C under a flow in two and three dimensions. Different densities of reactants A and B are fixed at both ends. For the reaction A+B , the concentration of reactants asymptotically decay in space as x-1/2 and x-3/4 in two dimensions and three dimensions, respectively. For 2A , it decays as log(x)/x in ...

Journal: :Nanoscale 2013
William A Solomonsz Graham A Rance Benjamin J Harris Andrei N Khlobystov

Platinum nanoparticles (PtNP) either imbedded within (PtNP@GNF) or adsorbed on the surface (PtNP/GNF) of hollow graphitised carbon nanofibres catalyse hydrosilylation reactions inside or outside the nanoreactor respectively. Comparison of the products formed using PtNP@GNF and PtNP/GNF reveals that nanoreactors create an environment promoting the formation of aromatic over aliphatic products in...

Journal: :E3S web of conferences 2022

The performance of the PEM fuel cell directly depends on partial pressure provided reactants, namely hydrogen and oxygen. Since reactants are consumed in reaction, decreases direction flow. This well-known mechanism makes dependent stoichiometry ratios input reactants. JRC ZERO∇CELL, a single testing setup, is developed to provide as much possible uniform operating conditions at 10cm 2 active a...

Journal: :European journal of rheumatology 2014
Metin Işık Hatice Şahin Engin Hüseyin

OBJECTIVE To test new platelet indices for patients with rheumatoid arthritis (RA) as new acute phase reactants. MATERIAL AND METHODS In total, 120 patients with RA and 40 patients in the control group were analyzed. A DAS 28 score over 2.6 was accepted as active disease, and a DAS 28 score lower than 2.6 was accepted as under remission. Platelet distribution width, plateletcrit, and mean pla...

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