Convective transport about cylinder with surface reaction of arbitrary order

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · AIChE Journal

DOI:https://doi.org/10.1002/aic.690420603· OSTI ID:256869

Nguyen, H D; Paik, S; Douglass, R W ^[1]

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1. Idaho National Engineering Lab., Idaho Falls, ID (United States)

Convective heat and mass transfer associated with a catalytic body have been encountered in a number of applications where the primary function of a catalyst is to lower the activation energy, thereby, creating a favorable condition for thermodynamically legible reactions to take place at an appreciable rate. Examples include the catalytic surface recombination of atoms and the packed tubular-wall reactor. Heat and mass transfer from a circular cylinder exposed to a convective environment with a surface reaction of arbitrary order is studied based on the stream function-vorticity formulation. A hybrid numerical scheme combining the Fourier spectral method in the angular direction and the spectral element method in the radial direction is used to solve the conservation equations along with an influence matrix technique to resolve the vorticity boundary conditions. Results showing the temporal evolution of the flow, temperature and concentration fields are presented for cases with and without vortex shedding with the latter triggered by the cylinder`s rotation. A parametric study is also performed to examine the influence of the Reynolds number, Grashof number, Prandtl number, Schmidt number, Damkoehler number, the reaction order, the flow alignment, the heat of reaction, the rotational velocity and the flow pulsation on the effectiveness of the reaction surface. With the exception rotation, they all exhibit strong dependence.

• DOE Contract Number: AC07-94ID13223
• OSTI ID: 256869
• Journal Information: AIChE Journal, Journal Name: AIChE Journal Journal Issue: 6 Vol. 42; ISSN 0001-1541; ISSN AICEAC
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CATALYSTS
CHEMICAL REACTORS
CYLINDERS
FLOW MODELS
HEAT TRANSFER
MASS TRANSFER
PARAMETRIC ANALYSIS
REACTION HEAT