Convective Heat Transfer Between a Bead Packing and Its Bounding Wall: Part II—Numerical Analysis and Experimental Validation

Sun, Yixun; Béguin, Cédric; Causse, Philippe; Benmokrane, Brahim; Trochu, F.

doi:10.1007/s11242-022-01791-7

Cited by 1 publication

(1 citation statement)

References 38 publications

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“…This comparison establishes that the packing structure represents a realistic PBR. Finally, we extracted a representative element volume (REV) 26,31–33 of the PBR of diameter

12 mm

and length

12 mm

, as shown in Figure 2. The REV was extracted from the middle of the Blender‐generated PBR geometry to ensure the porosity fluctuations are small.…”

Section: Modeling and Simulation Methodologymentioning

confidence: 99%

Hydrodynamics of bubble flow through a porous medium with applications to packed bed reactors

Nagrani,

Marconnet,

Christov

2023

AIChE Journal

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Gas‐liquid flows through packed bed reactors (PBRs) are challenging to predict due to the tortuous flow paths that fluid interfaces must traverse. Experiments at the International Space Station showed that bubble and pulse flows are predominately observed under microgravity conditions, while the trickle and spray flows observed under terrestrial conditions are not present in microgravity. To understand the physics behind the former experiments, we simulate bubble flow through a PBR for different packing‐particle‐diameter‐based Weber numbers and under different gravity conditions. We demonstrate different pore‐scale mechanisms, such as capillary entrapment, buoyancy entrapment, and inertia‐induced bubble displacement. Then, we perform a quantitative analysis by introducing new dynamic scales, dependent upon the evolving gas‐liquid interfacial area, to understand the dynamic trade‐offs between the inertia, capillary, and buoyancy forces on a bubble passing through a PBR. This analysis leads us to define new dimensionless Weber‐like numbers that delineate bubble entrapment from bubble displacement.

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“…This comparison establishes that the packing structure represents a realistic PBR. Finally, we extracted a representative element volume (REV) 26,31–33 of the PBR of diameter

12 mm

and length

12 mm

, as shown in Figure 2. The REV was extracted from the middle of the Blender‐generated PBR geometry to ensure the porosity fluctuations are small.…”

Section: Modeling and Simulation Methodologymentioning

confidence: 99%

Hydrodynamics of bubble flow through a porous medium with applications to packed bed reactors

Nagrani,

Marconnet,

Christov

2023

AIChE Journal

View full text Add to dashboard Cite

show abstract

Convective Heat Transfer Between a Bead Packing and Its Bounding Wall: Part II—Numerical Analysis and Experimental Validation

Cited by 1 publication

References 38 publications

Hydrodynamics of bubble flow through a porous medium with applications to packed bed reactors

Hydrodynamics of bubble flow through a porous medium with applications to packed bed reactors

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