The role of scale resolution versus inter-particle cohesive forces in two-fluid modeling of bubbling fluidization of Geldart A particles

2011 ◽  
Vol 66 (18) ◽  
pp. 4229-4240 ◽  
Author(s):  
Junwu Wang ◽  
M.A. van der Hoef ◽  
J.A.M. Kuipers
Keyword(s):  
Fluid Modeling ◽  
Cohesive Forces ◽  
Two Fluid

Development of five-moment two-fluid modeling for Z-pinch physics

2021 ◽  
Vol 28 (9) ◽  
pp. 092512
Author(s):  
E. T. Meier ◽  
U. Shumlak
Keyword(s):  
Fluid Modeling ◽  
Z Pinch ◽  
Two Fluid

scholarly journals Two-fluid modeling of bubbly flows around surface ships using a phenomenological subgrid air entrainment model

2011 ◽  
Vol 52 ◽  
pp. 50-57 ◽  
Author(s):  
Jingsen Ma ◽  
Assad A. Oberai ◽  
Mark C. Hyman ◽  
Donald A. Drew ◽  
Richard T. Lahey
Keyword(s):  
Air Entrainment ◽  
Bubbly Flows ◽  
Fluid Modeling ◽  
Two Fluid

scholarly journals Mode conversion of two-fluid shocks in a partially-ionised, isothermal, stratified atmosphere

2020 ◽  
Vol 637 ◽  
pp. A97
Author(s):  
B. Snow ◽  
A. Hillier
Keyword(s):  
Solar Atmosphere ◽  
Mode Conversion ◽  
Frictional Heating ◽  
Fast Mode ◽  
Compressional Waves ◽  
Pressure Scale ◽  
Velocity Drift ◽  
Two Fluid ◽  
Lower Solar Atmosphere

Context. The plasma of the lower solar atmosphere consists of mostly neutral particles, whereas the upper solar atmosphere is mostly made up of ionised particles and electrons. A shock that propagates upwards in the solar atmosphere therefore undergoes a transition where the dominant fluid is either neutral or ionised. An upwards propagating shock also passes a point where the sound and Alfvén speed are equal. At this point the energy of the acoustic shock can separated into fast and slow components. The way the energy is distributed between the two modes depends on the angle of magnetic field. Aims. We aim to investigate the separation of neutral and ionised species in a gravitationally stratified atmosphere. The role of two-fluid effects on the structure of the shocks post-mode-conversion and the frictional heating is quantified for different levels of collisional coupling. Methods. Two-fluid numerical simulations were performed using the (PIP) code of a wave steepening into a shock in an isothermal, partially-ionised atmosphere. The collisional coefficient was varied to investigate the regimes where the plasma and neutral species are weakly, strongly, and finitely coupled. Results. The propagation speeds of the compressional waves hosted by neutral and ionised species vary and, therefore, velocity drift between the two species is produced as the plasma attempts to propagate faster than the neutrals. This is most extreme for a fast-mode shock. We find that the collisional coefficient drastically impacts the features present in the system, specifically the mode conversion height, type of shocks present, and the finite shock widths created by the two-fluid effects. In the finitely-coupled regime, fast-mode shock widths can exceed the pressure scale height, which may lead to a new potential observable of two-fluid effects in the lower solar atmosphere.

Two-fluid modeling of a wet spouted fluidized bed with wet restitution coefficient model

2020 ◽  
Vol 364 ◽  
pp. 363-372 ◽  
Author(s):  
Hanbin Zhong ◽  
Yaning Zhang ◽  
Qingang Xiong ◽  
Juntao Zhang ◽  
Yuqin Zhu ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Restitution Coefficient ◽  
Fluid Modeling ◽  
Two Fluid

Two-fluid modeling of cratering in a particle bed by a subsonic turbulent jet

2017 ◽  
Vol 318 ◽  
pp. 68-82 ◽  
Author(s):  
Casey Q. LaMarche ◽  
Aldo Benavides Morán ◽  
Berend van Wachem ◽  
Jennifer Sinclair Curtis
Keyword(s):  
Turbulent Jet ◽  
Fluid Modeling ◽  
Particle Bed ◽  
Two Fluid

The role of cohesive forces in particle launching on the Moon and asteroids

2011 ◽  
Vol 59 (14) ◽  
pp. 1758-1768 ◽  
Author(s):  
Christine M. Hartzell ◽  
Daniel J. Scheeres
Keyword(s):  
The Moon ◽  
Cohesive Forces
Sign in / Sign up

Export Citation Format

Share Document