The effective diffusivity coefficient of DO is calculated to be 0.0172m2/d, which means the turbulence diffusion prevailes against the molecular diffusion inside the biocarrier.doi:10.3321/j.issn:0250-3301.2007.03.027ZHOU XiaohongSHI Hanchang
Measurement of the effective diffusion coefficient of dissolved oxygen (DO) in a spherical biocarrier was introduced. 采用自制的溶解氧微电极检测沿载体半径方向上的溶解氧分布,结合扩散-反应方程拟合获得载体内部的溶解氧有效扩散系数。 更多例句>> 补充资料:有效扩散系数 分子式:CAS号:性质:有效扩散系数的意义...
Yu, Z., Carter, R.N., Zhang, J.: Measurements of pore size distribution, porosity, effective oxygen diffusivity, and tortuosity of PEM fuel cell electrodes. Fuel Cells 12, 557–565 (2012) Article Google Scholar Yuan, J.L., Sunden, B.: On mechanisms and models of multi-component gas...
S.X. Wang, Y.L. Wang, Investigation of the through-plane effective oxygen diffusivity in the porous media of PEM fuel cells: effects of the pore size distribution and water saturation distribution, Int. J. Heat Mass Transf. 98 (2016) 541....
The limit imposed by the finite diffusivity of carriers toward the surface discussed previously in Eq. (10) applies also to the case of very high Jo (in high injection conditions the ambipolar diffusivity, DA≈18 cm2/s, substitutes the minority carrier diffusion coefficient, Dn). Because of ...
Diffusivity determination of aqueous polysulfide ions through ion-exchange-membranes To study the diffusivity of polysulfide ions through the membranes, permeation experiments were performed using an H-cell setup for single-membrane structure and RFB setup for dual-membrane structure, as shown in the ...
the effective diffusivity along the direction perpendicular to bedding planes was much lower than that along the direction parallel to bedding planes.In addition,an effective diffusivity model was developed,which could be used to describe the mass transfer of oxygen in the ash layer of oil shale ...
This method was based on the transient diffusion of oxygen from air into an initially nitrogen purged porous sample and has proven to be accurate, fast, and straightforward. As anticipated, with higher compressions and higher PTFE loadings, effective diffusivity decreased, as a result of less pore...
In this second step, thermophysical properties of PMMA, of the insulation material, and of the pyrolysis residue are determined, using the Cone Calorimeter. For PMMA, these properties are: emissivity, absorption coefficient, refractive index, specific heat and thermal conductivity. The thermal ...
Paldor, Constraints on effective diffusivity during oxygen isotope exchange at a marble-schist contact, Sifnos (Cyclades), Greece, Earth Planet. Sci. Lett. 94, 208-216, 1989.Ganor J, Matthews A, Paldor N (1989) Constraints on effective diffusivity during oxygen isotope exchange at a marble-...