A critical comparison of frictional stress models applied to the simulation of bubbling fluidized beds

A. Passalacqua; L. Marmo

doi:10.1016/j.ces.2009.03.005

A critical comparison of frictional stress models applied to the simulation of bubbling fluidized beds

Chemical Engineering Science ◽

10.1016/j.ces.2009.03.005 ◽

2009 ◽

Vol 64 (12) ◽

pp. 2795-2806 ◽

Cited By ~ 60

Author(s):

A. Passalacqua ◽

L. Marmo

Keyword(s):

Fluidized Beds ◽

Frictional Stress ◽

Critical Comparison ◽

Stress Models

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The crucial role of frictional stress models for simulation of bubbling fluidized beds

Powder Technology ◽

10.1016/j.powtec.2014.09.050 ◽

2015 ◽

Vol 270 ◽

pp. 68-82 ◽

Cited By ~ 23

Author(s):

Meisam Farzaneh ◽

Alf-Erik Almstedt ◽

Filip Johnsson ◽

David Pallarès ◽

Srdjan Sasic

Keyword(s):

Crucial Role ◽

Fluidized Beds ◽

Frictional Stress ◽

Stress Models

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Critical comparison of hydrodynamic models for gas–solid fluidized beds—Part II: freely bubbling gas–solid fluidized beds

Chemical Engineering Science ◽

10.1016/j.ces.2004.07.058 ◽

2005 ◽

Vol 60 (1) ◽

pp. 73-84 ◽

Cited By ~ 91

Author(s):

D.J. Patil ◽

M. van Sint Annaland ◽

J.A.M. Kuipers

Keyword(s):

Fluidized Beds ◽

Hydrodynamic Models ◽

Critical Comparison

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CFD simulation of the high shear mixing process using kinetic theory of granular flow and frictional stress models

Chemical Engineering Science ◽

10.1016/j.ces.2008.01.018 ◽

2008 ◽

Vol 63 (8) ◽

pp. 2188-2197 ◽

Cited By ~ 46

Author(s):

Anders Darelius ◽

Anders Rasmuson ◽

Berend van Wachem ◽

Ingela Niklasson Björn ◽

Staffan Folestad

Keyword(s):

Kinetic Theory ◽

Granular Flow ◽

Cfd Simulation ◽

Frictional Stress ◽

High Shear ◽

Mixing Process ◽

Shear Mixing ◽

Stress Models

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06/00300 Critical comparison of hydrodynamic models forgas-solid fluidized beds — Part I: Bubbling gas-solid fluidized beds operated with a jet

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(06)80300-0 ◽

2006 ◽

Vol 47 (1) ◽

pp. 42

Keyword(s):

Fluidized Beds ◽

Hydrodynamic Models ◽

Critical Comparison

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06/00301 Critical comparison of hydrodynamic models forgas-solid fluidized beds – Part II: Freely bubbling gas-solid fluidized beds

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(06)80301-2 ◽

2006 ◽

Vol 47 (1) ◽

pp. 42

Keyword(s):

Fluidized Beds ◽

Hydrodynamic Models ◽

Critical Comparison

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Experimental validation of CFD models for fluidized beds: Influence of particle stress models, gas phase compressibility and air inflow models

Chemical Engineering Science ◽

10.1016/j.ces.2005.09.014 ◽

2006 ◽

Vol 61 (5) ◽

pp. 1705-1717 ◽

Cited By ~ 39

Author(s):

K. Johansson ◽

B.G.M. van Wachem ◽

A.E. Almstedt

Keyword(s):

Gas Phase ◽

Fluidized Beds ◽

Experimental Validation ◽

Cfd Models ◽

Stress Models

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Critical comparison of hydrodynamic models for gas–solid fluidized beds—Part I : bubbling gas–solid fluidized beds operated with a jet

Chemical Engineering Science ◽

10.1016/j.ces.2004.07.059 ◽

2005 ◽

Vol 60 (1) ◽

pp. 57-72 ◽

Cited By ~ 132

Author(s):

D.J. Patil ◽

M. van Sint Annaland ◽

J.A.M. Kuipers

Keyword(s):

Fluidized Beds ◽

Hydrodynamic Models ◽

Critical Comparison

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Characterization of interfaces in CVD-coated nicalon fiber-reinforced SiC

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100154755 ◽

1989 ◽

Vol 47 ◽

pp. 556-557

Author(s):

K.L. More ◽

R.A. Lowden

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Chemical Vapor ◽

Chemical Vapor Infiltration ◽

Frictional Stress ◽

Fiber Reinforced ◽

Pull Out ◽

Carbon Coated ◽

Fiber Matrix

The mechanical properties of fiber-reinforced composites are directly related to the nature of the fiber-matrix bond. Fracture toughness is improved when debonding, crack deflection, and fiber pull-out occur which in turn depend on a weak interfacial bond. The interfacial characteristics of fiber-reinforced ceramics can be altered by applying thin coatings to the fibers prior to composite fabrication. In a previous study, Lowden and co-workers coated Nicalon fibers (Nippon Carbon Company) with silicon and carbon prior to chemical vapor infiltration with SiC and determined the influence of interfacial frictional stress on fracture phenomena. They found that the silicon-coated Nicalon fiber-reinforced SiC had low flexure strengths and brittle fracture whereas the composites containing carbon coated fibers exhibited improved strength and fracture toughness. In this study, coatings of boron or BN were applied to Nicalon fibers via chemical vapor deposition (CVD) and the fibers were subsequently incorporated in a SiC matrix. The fiber-matrix interfaces were characterized using transmission and scanning electron microscopy (TEM and SEM). Mechanical properties were determined and compared to those obtained for uncoated Nicalon fiber-reinforced SiC.

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