Methanol steam reforming plays a pivotal role to produce hydrogen for fuel cell systems in a low temperature range. To accomplish higher methanol conversion and lower CO production, the reaction was catalyzed by CuZnFe mixed oxides. Various ratios of Fe and Cu/Zn were coprecipitated in differential method to optimize the CuZnFe structure. The sample containing 45Cu50Zn5Fe (Wt. %) revealed its m...

This study is concerned with the prediction of particles’ velocity in a dilute turbulent gas-solidboundary layer flow using a fully Eulerian two-fluid model. The closures required for equationsdescribing the particulate phase are derived from the kinetic theory of granular flows. Gas phaseturbulence is modeled by one-equation model and solid phase turbulence by MLH theory. Resultsof one-way and...

this paper describes the effects of induced magnetic field and partial slip on the peristaltic flow of a couple stress fluids in an asymmetric channel. the two dimensional equation of couple stress fluid are simplified by making the assumptions of long wave length and low reynolds number. the exact solutions of reduced momentum equation and magnetic force function have been computed in wave fra...

Resonance line-profile calculations based on hydrodynamical models of cataclysmic variable winds. ABSTRACT We describe a method of calculating synthetic line profiles using a generalized version of the Sobolev approximation. We apply this method to calculate line profiles predicted by the models of two-dimensional line-driven winds from luminous disks due to Proga, Stone & Drew. We describe the...

Free Surface Test (2D).. Our free surface Stokes test case is a fluid disk of radius r = 0.75 centred at the origin, with density ρ = 1 and viscosity μ = 0.1, computed over a timestep ∆t = 1 . For simplicity of presentation, we describe the final velocity field in terms of a stream function,ψ , where the velocity field can be derived as uf inal = ∇ ×ψ . This also guarantees that the velocity fi...

Abstract Tidally dissolved globular clusters form thin stellar streams that preserve a historical record of their past evolution. We report radial velocity dispersion 2.1 ± 0.3 km s −1 in the GD-1 stream using sample 43 spectroscopically confirmed members. The is constant over surveyed ≈15° span stream. also measured spur adjacent to main stream, and found similar value at tip spur. Surprisingl...