Bosanquet formula

Using resistance-in-series model (Bosanquet formula), the diffusivity in pore... 

In the equations, lc and la represent the thickness of the cathode and of the anode respectively P is the total pressure, and A,eff represents the effective diffusion coefficient of the species i (either at the anode or at the cathode). To evaluate the effective diffusion coefficient, the Bosanquet formula [11] has been used ... 

In a transition region, the Bosanquet formula can be used that accounts for both contributions ... 

The effective diffusion coefficients. Die, obtained from the parameter tdjf, include contributions from the Knudsen diffusion mechanism and from the molecular diffusion mechanism. Because of the very low tracer concentrations the Bosanquet formula (3) is applicable. 

By observation, we found that the average height of the emissions plume from the main stack of En-Menatof was about 25 m for an average wind speed of 4.25 m/s, so the actual maximum height used for calculations of concentrations on ground is that deducted from the Bosanquet formula (H = 124.33 m). 

This additive resistance relation is often called the Bosanquet formula. ... 

For the reaction A — B at steady state, diffusion in the pore is equimolar counterdiffusion, Na = -Nb, and a = 0. The composition dependence in Equation 2.52 is passed on to particle diffu-sivities (Dg) and presents an important drawback in the integration of intraparticle diffusion-reaction equations. However, diffusion fluxes in multicomponent systems may be diverse, and it has been indicated that, on the whole, the dependence of Dcomb on composition is rather weak, and therefore, common practice has been to use the simpler composition-independent form of the equation [7, 9, 32] this additive resistance relationship is the Bosanquet formula [17, 33] ... 

This additive resistance relation is the Bosanquet formula. 

As a first approach to calculate the combined bulk and Knudsen diffusive flux using a Fickian flux formulation, the Bosanquet formula [11] has been suggested in literature [11,70,151]. In this approach, the Fick form formulation uses a diffusivity computed as the reciprocal additivity of the diffusion coefficients in the ordinary and Knudsen diffusion regimes. 

Krishna R, van Baten JM (2012) Investigating the validity of the bosanquet formula for... 

Besides the work with Carr and Schmidt, I had a very pleasant interaction with Ed Cussler over some problems in mass transfer through membranes with barriers [238], through anisotropic membranes [232], and by facilitated diffusion [247]. A severely mathematical problem of diffusion through a slot could be solved by a Schwartz-Christoffel transformation,41 and provided an asymptotic formula that proved useful in the barrier problem [223]. Cussler was delightful to work with because he refused to accept any mathematical solution that could not be unpacked and shown to be physically sensible (cf. [244]). Next to Bosanquet, he is the most intuitive problem solver with whom I have worked. Chapter 19 [232] is reprinted here. 

For unimodal pore size distribution the effective diffusivity inside a catalyst particle is given by Bosanquet s formula ... 

As the mean free path of a gas is in the order of 100 nm, Kn is small for the carbon paper GDL and the Knudsen effect can be neglected. But pore sizes inside the MPL are of the same order of magnitude as the mean free path of the gas and thus Knudsen effects have to be taken into account. The Knudsen diffusion effect in the MPL was investigated by Becker et al. by applying Bosanquet s formula " ... 

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