Results 181 to 190 of about 9,074 (225)
Some of the next articles are maybe not open access.
Detection of flow maldistribution in packed‐beds via tracers
AIChE Journal, 1990Presentation d'une procedure, appelee methode LT (Laplace Transform), pour le decouplage des effets des particules des effets de l'ecoulement externe a partir d'une courbe de reponse obtenue par ...
Peter J. Hanratty, Milorad P. Duduković
openaire +1 more source
Estimations of Gas Flow Maldistribution in Packed‐Bed Columns
Chemical Engineering & Technology, 2008AbstractA review of research articles dealing with estimation of the rate of gas flow maldistribution in packed‐bed columns is presented. The proposed relations for determination of the maldistribution factor are given along with the conditions at which they are obtained.
T. Petrova +3 more
openaire +1 more source
Maldistribution in the Radial-Flow Fixed Bed Reactor
1986Radial-flow reactors provide high capacity without increased pressure drop or greatly increased vessel dimensions. This is done by holding the catalyst in a basket forming an annular bed, and causing the gas to flow between the central tube and the outer annulus (separating the catalyst bed and the external pressure shell). This presents the gases with
C-. S. Yoo, A. G. Dixon
openaire +1 more source
Flow maldistributions in packed beds: Effects of reactant consumption
Chemical Engineering Science, 1993Abstract A simple two-dimensional model of a packed bed with down flow in which an exothermic reaction occurs is analyzed. Orthogonal collocation and continuation techniques are used to calculate the flow patterns and bifurcation diagrams. Steady-state solutions with and without stagnant regions as well as periodic and chaotic time-dependent ...
Friedemanns Stroh, Vemuri Balakotaiah
openaire +1 more source
Effect of Flow Maldistribution on Multipassage Heat Exchanger Performance
Heat Transfer Engineering, 1985Multipassage heat exchangers are normally designed with the assumption that the fluid stream is uniformly divided among all the parallel channels. But, in practice, an improper entrance configuration or imperfect flow passages create a flow maldistribution.
Kanchan Chowdhury, Sunil Sarangi
openaire +1 more source
Evaluation of flow maldistribution in air-cooled heat exchangers
Computers & Fluids, 2009Investigation of the evaluation of flow maldistribution in air-cooled heat exchangers is presented. The flow field in the inlet and return headers was obtained through the numerical solution of the governing partial differential equations including the conservation equations of mass and momentum in addition to the equations of the turbulence model. The
M.A. Habib +5 more
openaire +1 more source
Mitigation of Flow Maldistribution in Parallel Microchannel Heat Sink
IEEE Transactions on Components, Packaging and Manufacturing Technology, 2019Flow rate nonuniformities (termed as maldistribution) among a stack of microchannels connected with each other through the inlet/outlet plenums of a microchannel heat sink (MCHS) are one of the major hindrances associated with effective and efficient operations. That induces many undesirable effects, including accentuation of lateral and flow direction
Vikas Yadav +2 more
openaire +1 more source
Measuring maldistribution of two-phase flows in multi-parallel microchannels
Applied Thermal Engineering, 2015Liquid flow distributions were measured in nine parallel microchannels with inner diameters of 0.8 mm connected to a common header, fed by air water flows through a single tube. Flow maldistribution in the microchannels was analyzed considering the combined effects of the two-phase flow characteristics (flow pattern, gas quality, mass fluxes and ...
E.R. Dario +3 more
openaire +2 more sources
Modeling of reaction‐induced flow maldistributions in packed beds
AIChE Journal, 1991AbstractThis work examines reaction‐induced flow maldistributions in adiabatic, downflow packed beds. Using linear stability analysis it is shown that for the case of a constant heat source, the uniform flow loses stability when a certain dimensionless group, the Darcy buoyancy number, exceeds a critical value. Center manifold theory is used to analyze
Friedemann Stroh, Vemuri Balakotaiah
openaire +1 more source
Flow maldistribution in interdigitated channels used in PEM fuel cells
Journal of Power Sources, 2006Abstract The interdigitated flow configuration is unique in the sense that the reactants are forced through the porous electrodes in this configuration, whereas this occurs by diffusion in the conventional types of flow fields. Previous studies have shown that this reduces the possibility of flooding of the cathode electrode resulting in improved ...
K.B. Shyam Prasad +2 more
openaire +1 more source