Numerical investigation for the suitable choice of bubble diameter correlation for EMMS/bubbling drag model

2021 ◽  
Author(s):  
Nouman Ahmad ◽  
Jianqiang Deng ◽  
Muhammad Adnan
Keyword(s):  
Numerical Investigation ◽  
Bubble Diameter ◽  
Suitable Choice ◽  
Drag Model

scholarly journals Numerical investigation of bubble diameter in branched microchannel

2020 ◽  
Vol 912 ◽  
pp. 022017
Author(s):  
C S K Balasekhar ◽  
P Tanish ◽  
Ayush Mishra ◽  
Atul Kushwaha ◽  
Pankaj Kumar
Keyword(s):  
Numerical Investigation ◽  
Bubble Diameter

scholarly journals A Bubble-Based Drag Model at the Local-Grid Level for Eulerian Simulation of Bubbling Fluidized Beds

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Kun Hong ◽  
Manqian Cao ◽  
Atta Ullah
Keyword(s):  
Fluidized Beds ◽  
Fluid Model ◽  
Structural Parameters ◽  
Bubble Diameter ◽  
Momentum Conservation ◽  
Drag Model ◽  
Solids Concentration ◽  
Local Grid ◽  
Two Fluid Model ◽  
Grid Level

A bubble-based drag model at the local-grid level is proposed to simulate gas-solid flows in bubbling fluidized beds of Geldart A particles. In this model, five balance equations are derived from the mass and the momentum conservation. This set of equations along with necessary correlations for bubble diameter and voidage of emulsion phase is solved to obtain seven local structural parameters (uge,upe,εe,δb,ub,db, andab) which describe heterogeneous flows of bubbling fluidized beds. The modified drag coefficient obtained from the above-mentioned structural parameters is then incorporated into the two-fluid model to simulate the hydrodynamics of Geldart A particles in a lab-scale bubbling fluidized bed. The comparison between experimental and simulation results for the axial and radial solids concentration profiles is promising.

Numerical Investigation of Discharge Current Path in a Hydrogen MPD Thruster

2016 ◽  
Vol 136 (3) ◽  
pp. 141-146 ◽  
Author(s):  
Akira Kawasaki ◽  
Kenichi Kubota ◽  
Ikkoh Funaki ◽  
Yoshihiro Okuno
Keyword(s):  
Numerical Investigation ◽  
Discharge Current ◽  
Current Path
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