Computational study of flow and heat transfer in fixed beds with cylindrical particles for low tube to particle diameter ratios

2018 ◽  
Vol 132 ◽  
pp. 149-161 ◽  
Author(s):  
Minhua Zhang ◽  
He Dong ◽  
Zhongfeng Geng
Keyword(s):  
Heat Transfer ◽  
Computational Study ◽  
Particle Diameter ◽  
Flow And Heat Transfer ◽  
Fixed Beds ◽  
Cylindrical Particles

Computational study of fluid flow and heat transfer in composite packed beds of spheres with low tube to particle diameter ratio

2016 ◽  
Vol 300 ◽  
pp. 85-96 ◽  
Author(s):  
Jian Yang ◽  
Jiangquan Wu ◽  
Lang Zhou ◽  
Qiuwang Wang
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Computational Study ◽  
Particle Diameter ◽  
Diameter Ratio ◽  
Packed Beds ◽  
Flow And Heat Transfer

Pore-scale simulations of unsteady flow and heat transfer in tubular fixed beds

AIChE Journal ◽  
2009 ◽  
Vol 55 (4) ◽  
pp. 849-867 ◽  
Author(s):  
P. Magnico
Keyword(s):  
Heat Transfer ◽  
Unsteady Flow ◽  
Pore Scale ◽  
Flow And Heat Transfer ◽  
Fixed Beds

Computational Study of Streamfunction-Vorticity Formulation of Incompressible Flow and Heat Transfer Problems

2011 ◽  
Vol 52-54 ◽  
pp. 511-516 ◽  
Author(s):  
Arup Kumar Borah
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Boundary Conditions ◽  
Incompressible Flow ◽  
Computational Study ◽  
The Other ◽  
Governing Equations ◽  
Flow And Heat Transfer ◽  
Continuity Constraint ◽  
Transfer Problems

In this paper we have studied the streamfunction-vorticity formulation can be advantageously used to analyse steady as well as unsteady incompressible flow and heat transfer problems, since it allows the elimination of pressure from the governing equations and automatically satisfies the continuity constraint. On the other hand, the specification of boundary conditions for the streamfunction-vorticity is not easy and a poor evaluation of these conditions may lead to serious difficulties in obtaining a converged solution. The main issue addressed in this paper is the specification in the boundary conditions in the context of finite element of discretization, but approach utilized can be easily extended to finite volume computations.

Computational study on fluid flow and heat transfer characteristic of hollow structured packed bed

2019 ◽  
Vol 344 ◽  
pp. 463-474 ◽  
Author(s):  
Zehua Guo ◽  
Zhongning Sun ◽  
Nan Zhang ◽  
Ming Ding ◽  
Haozhi Bian ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Transfer Characteristic ◽  
Computational Study ◽  
Packed Bed ◽  
Transfer Characteristic ◽  
Flow And Heat Transfer

Flow and heat transfer in narrow fixed beds with axial thermowells

2019 ◽  
Vol 76 (11) ◽  
pp. 811-829 ◽  
Author(s):  
Anthony G. Dixon ◽  
Yan Wu
Keyword(s):  
Heat Transfer ◽  
Flow And Heat Transfer ◽  
Fixed Beds

Computational study of particle packing process and fluid flow inside Polydisperse cylindrical particles fixed beds

2019 ◽  
Vol 354 ◽  
pp. 19-29 ◽  
Author(s):  
Minhua Zhang ◽  
He Dong ◽  
Zhongfeng Geng
Keyword(s):  
Fluid Flow ◽  
Computational Study ◽  
Particle Packing ◽  
Packing Process ◽  
Fixed Beds ◽  
Cylindrical Particles

Numerical Study of Laminar Forced Convection Fluid Flow and Heat Transfer From a Triangular Cylinder Placed in a Channel

2006 ◽  
Vol 129 (5) ◽  
pp. 646-656 ◽  
Author(s):  
Arnab Kumar De ◽  
Amaresh Dalal
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Computational Study ◽  
Lift Coefficient ◽  
Stream Velocity ◽  
Blockage Ratio ◽  
Global Mode ◽  
Flow And Heat Transfer ◽  
Wake Instability ◽  
Laminar Forced Convection

Computational study of two-dimensional laminar flow and heat transfer past a triangular cylinder placed in a horizontal channel is presented for the range 80≤Re≤200 and blockage ratio 1/12≤β≤1/3. A second-order accurate finite volume code with nonstaggered arrangement of variables is developed employing momentum interpolation for the pressure-velocity coupling. Global mode of cross-stream velocity oscillations predict the first bifurcation point increases linearly with blockage ratio with no second bifurcation found in the range of Re studied. The Strouhal number and rms of lift coefficient increase significantly with blockage ratio and Reynolds number while overall Nusselt number remains almost unchanged for different blockage ratios. At lower blockage ratios, flow is found to be similar to the unconfined flow and is more prone to wake instability. Instantaneous streak lines provide an excellent means of visualizing the von Kármán vortex street.

Fluid Flow and Heat Transfer in a Lid-Driven Cavity Due to an Oscillating Thin Fin: Transient Behavior

2004 ◽  
Vol 126 (6) ◽  
pp. 924-930 ◽  
Author(s):  
Xundan Shi ◽  
J. M. Khodadadi
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Computational Study ◽  
Transient Behavior ◽  
Phase Lag ◽  
Dimensionless Time ◽  
Number Range ◽  
Flow And Heat Transfer ◽  
Periodic State ◽  
The Mean

A finite-volume-based computational study of transient laminar flow and heat transfer (neglecting natural convection) within a lid-driven square cavity due to an oscillating thin fin is presented. The lid moves from left to right and a thin fin positioned perpendicular to the right stationary wall oscillates in the horizontal direction. The length of the fin varies sinusoidally with its mean length and amplitude equal to 10 and 5 percent of the side of the cavity, respectively. Two Reynolds numbers of 100 and 1000 for a Pr=1 fluid were considered. For a given convection time scale tconv, fin’s oscillation periods (τ) were selected in order to cover both slow τ/tconv>1 and fast τ/tconv<1 oscillation regimes. This corresponded to a Strouhal number range of 0.005 to 0.5. The number of the cycles needed to reach the periodic state for the flow and thermal fields increases as τ/tconv decreases for both Re numbers with the thermal field attaining the periodic state later than the velocity field. The key feature of the transient evolution of the fluid flow for the case with Re=1000 with slow oscillation is the creation, lateral motion and subsequent wall impingement of a CCW rotating vortex within the lower half of the cavity. This CCW rotating vortex that has a lifetime of about 1.5τ brings about marked changes to the temperature field within a cycle. The dimensionless time for the mean Nusselt numbers to reach their maximum or minimum is independent of the frequency of the fin’s oscillation and is dependent on the distance between the oscillating fin and the respective wall, and the direction of the primary CW rotating vortex. The phase lag angle between the oscillation of the fin and the mean Nusselt number on the four walls increases as the distance between the fin and the respective wall increases.

Flow and heat transfer in cross-stream type T-junctions: A computational study

2018 ◽  
Vol 71 ◽  
pp. 179-188 ◽  
Author(s):  
B. Krumbein ◽  
V. Termini ◽  
S. Jakirlić ◽  
C. Tropea
Keyword(s):  
Heat Transfer ◽  
Computational Study ◽  
Flow And Heat Transfer ◽  
Stream Type
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