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Sketch of the diffuser in Mansour et al. [ 29 ]. The inlet and outlet are s...
Published Online: December 2, 2022
Fig. 2 Sketch of the diffuser in Mansour et al. [ 29 ]. The inlet and outlet are shortened for the computational domain. More
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( a ) Mesh for case C at the diverging part. ( b ) Cell volume at the middl...
Published Online: December 2, 2022
Fig. 3 ( a ) Mesh for case C at the diverging part. ( b ) Cell volume at the middle plane of the diffuser for case C. The marked regions at the entrance walls are the regions where the bubble volume ( 5.24 × 10 − 10   m 3 ) exceeds the cell volume. More
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Velocity magnitude in the middle plane of the diffuser captured with LES us...
Published Online: December 2, 2022
Fig. 4 Velocity magnitude in the middle plane of the diffuser captured with LES using the LUST scheme. The gray area marks the region, where the upwind scheme is applied. More
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Comparison of the flow characteristics (instantaneous images) and the avera...
Published Online: December 2, 2022
Fig. 5 Comparison of the flow characteristics (instantaneous images) and the average position and size of the continuous gas (averaged images) for case A. The red cross marks the separation point: ( a ) instantaneous experimental shadowgraph [ 50 ], ( b ) averaged experimental shadowgraph [ 50 ], ... More
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Comparison of the flow characteristics (instantaneous images) and the avera...
Published Online: December 2, 2022
Fig. 6 Comparison of the flow characteristics (instantaneous images) and the average position and size of the continuous gas region (averaged images) for case B. The red cross marks the separation point: ( a ) instantaneous experimental shadowgraph [ 50 ], ( b ) averaged experimental shadowgraph [... More
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Comparison of the flow characteristics (instantaneous images) and the avera...
Published Online: December 2, 2022
Fig. 7 Comparison of the flow characteristics (instantaneous images) and the average position and size of the continuous gas region (averaged images) for case C. The red cross marks the separation point: ( a ) Instantaneous experimental shadowgraph [ 50 ], ( b ) averaged experimental shadowgraph [... More
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Pressure probes along the diffuser for case A and case C, compared to exper...
Published Online: December 2, 2022
Fig. 8 Pressure probes along the diffuser for case A and case C, compared to experimental measurements [ 29 ]. Positions of the probes are shown in Fig. 2 : ( a ) case A and ( b ) case C. More
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Mean continuous (solid lines, left axis) and disperse (dashed lines, right ...
Published Online: December 2, 2022
Fig. 9 Mean continuous (solid lines, left axis) and disperse (dashed lines, right axis) gas volume of the simulations, related to the entire gas volume of case A. The contour of the diffuser is shown in the background to emphasize the location of the accumulation. More
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Relative deviations of averaged gas volume obtained with different bubble d...
Published Online: December 2, 2022
Fig. 10 Relative deviations of averaged gas volume obtained with different bubble diameters: ( a ) case A, ( b ) case B, and ( c ) case C More
Journal Articles
Journal Articles
Journal Articles
Journal Articles
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Buoyancy parameter (i.e., rescaled fluctuating density) field in a 2048 3  ...
Published Online: November 23, 2022
Fig. 1 Buoyancy parameter (i.e., rescaled fluctuating density) field in a 2048 3 cells three-dimensional simulation (presented in Ref. [ 26 ]) of the USHT configuration showing the interpenetration of heavy and light fluids and the strongly anisotropic nature of this buoyancy induced flow (with a... More
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Turbulent kinetic evolution of USHT predicted by EDQNM (reference) and diff...
Published Online: November 23, 2022
Fig. 2 Turbulent kinetic evolution of USHT predicted by EDQNM (reference) and different mix models k − ε , 2SFK and GSG for ( F r 0 , Λ 0 , s ) = ( 0.34 , 10 , 4 ) . Gravity is switched on at t  =  t 0 when a self-similar decaying HIT is reached. More
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Turbulent dissipation    E    (left) and Froude number     (  E  /  K  )  /...
Published Online: November 23, 2022
Fig. 3 Turbulent dissipation E (left) and Froude number ( E / K ) / N (right) evolution of USHT predicted for ( F r 0 , Λ 0 , s ) = ( 0.34 , 10 , 4 ) by EDQNM (circles) and different mix models: k − ε (dotted lines), 2SFK (dashed l... More
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Turbulent dissipation evolution of USHT predicted for left:     (  F    r  ...
Published Online: November 23, 2022
Fig. 4 Turbulent dissipation evolution of USHT predicted for left: ( F r 0 , Λ 0 , s ) = ( 0.34 , 1 , 4 ) , right: ( F r 0 , Λ 0 , s ) = ( 0.34 , 100 , 4 ) by EDQNM (circles) and different mix models: k − ε (dotted ... More
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Temporal evolution of the ratio      K  *   /  K     of nondirected to tota...
Published Online: November 23, 2022
Fig. 5 Temporal evolution of the ratio K * / K of nondirected to total kinetic turbulent energy predicted by EDQNM for F r 0 = 0.34 , s  =   4 and the different initial mixing parameters used in the previous figures Λ 0 = 1 , 10 , and 100 More