scholarly journals A force balance model for the motion, impact, and bounce of bubbles

2014 ◽  
Vol 26 (9) ◽  
pp. 092101 ◽  
Author(s):  
Evert Klaseboer ◽  
Rogerio Manica ◽  
Maurice H. W. Hendrix ◽  
Claus-Dieter Ohl ◽  
Derek Y. C. Chan
Keyword(s):  
Force Balance ◽  
Balance Model

scholarly journals Glaciological studies on Nelson Island, South Shetland Islands, Antarctica

1995 ◽  
Vol 41 (138) ◽  
pp. 408-412 ◽  
Author(s):  
Ren Jiawen ◽  
Qin Dahe ◽  
J. R. Petit ◽  
J. Jouzel ◽  
Wang Wenti ◽  
...  
Keyword(s):  
Accumulation Rate ◽  
Local Environment ◽  
High Viscosity ◽  
Force Balance ◽  
South Shetland Islands ◽  
Balance Model ◽  
Shetland Islands ◽  
Ice Cap ◽  
Basal Sliding ◽  
Marine Air

AbstractThe ice cap on Nelson Island in the South Shetland Islands, West Antarctica, was studied between 1985 and 1989. The ice cap has an average thickness of 120 m. it is temperate, exists under the sub-Antarctic maritime climate and almost completely covers the island. Owing to intense percolation of meltwater (and, to some extent, liquid precipitation), the snow-firn layer is in the soaked facies, with a firn-ice transition at a depth of 25-26 m at the summit. A force-balance model suggests that the ice is almost linearly viscous but has a high viscosity. The model further suggests that basal sliding makes a larger contribution to the ice movement than does ice deformation. From 1970 to 1988. the average accumulation rate was 120 kg m−2a−1at the centre, and between 1985 and 1989 the equilibrium-line elevation averaged 110m a.s.l. Analysis of chemical impurities in the surface snow suggests that the precipitation source is mainly local marine air masses and that human activity has already exerted a detectable influence on the local environment.

scholarly journals Ase1/Prc1-dependent spindle elongation corrects merotely during anaphase in fission yeast

2009 ◽  
Vol 187 (3) ◽  
pp. 399-412 ◽  
Author(s):  
Thibault Courtheoux ◽  
Guillaume Gay ◽  
Yannick Gachet ◽  
Sylvie Tournier
Keyword(s):  
Fission Yeast ◽  
Mechanical Model ◽  
Elongation Rate ◽  
Force Balance ◽  
Balance Model ◽  
Spindle Poles ◽  
Sister Chromatids ◽  
Spindle Elongation ◽  
Dependent Mechanism

Faithful segregation of sister chromatids requires the attachment of each kinetochore (Kt) to microtubules (MTs) that extend from opposite spindle poles. Merotelic Kt orientation is a Kt–MT misattachment in which a single Kt binds MTs from both spindle poles rather than just one. Genetic induction of merotelic Kt attachment during anaphase in fission yeast resulted in intra-Kt stretching followed by either correction or Kt disruption. Laser ablation of spindle MTs revealed that intra-Kt stretching and merotelic correction were dependent on MT forces. The presence of multiple merotelic chromosomes linearly antagonized the spindle elongation rate, and this phenomenon could be solved numerically using a simple force balance model. Based on the predictions of our mechanical model, we provide in vivo evidence that correction of merotelic attachment in anaphase is tension dependent and requires an Ase1/Prc1-dependent mechanism that prevents spindle collapse and thus asymmetric division and/or the appearance of the cut phenotype.

scholarly journals An analytical force balance model for dust particles with size up to several Debye lengths

2017 ◽  
Vol 24 (11) ◽  
pp. 113702 ◽  
Author(s):  
D. U. B. Aussems ◽  
S. A. Khrapak ◽  
İ. Doğan ◽  
M. C. M. van de Sanden ◽  
T. W. Morgan
Keyword(s):  
Force Balance ◽  
Dust Particles ◽  
Balance Model

Investigation of the Influence of Elevated Pressure on Subcooled Boiling Flow—Model Evaluation Toward Generic Approach

2017 ◽  
Vol 139 (7) ◽  
Author(s):  
Sara Vahaji ◽  
Sherman Chi Pok Cheung ◽  
Guan Heng Yeoh ◽  
Jiyuan Tu
Keyword(s):  
Mechanistic Model ◽  
Elevated Pressure ◽  
Nucleation Site ◽  
Empirical Models ◽  
Mechanistic Modeling ◽  
Force Balance ◽  
Balance Model ◽  
Subcooled Boiling ◽  
Flow Conditions ◽  
Wide Range

Modeling subcooled boiling flows in vertical channels has relied heavily on the utilization of empirical correlations for the active nucleation site density, bubble departure diameter, and bubble departure frequency. Following the development and application of mechanistic modeling at low pressures, the capability of the model to resolve flow conditions at elevated pressure up to 10 bar is thoroughly assessed and compared with selected empirical models. Predictions of the mechanistic and selected empirical models are validated against two experimental data at low to elevated pressures. The results demonstrate that the mechanistic model is capable of predicting the heat and mass transfer processes. In spite of some drawbacks of the currently adopted force balance model, the results still point to the great potential of the mechanistic model to predict a wide range of flow conditions in subcooled boiling flows.

Modified Force Balance Model of Estimating Agglomerate Sizes in a Gas–Solid Fluidized Bed

2019 ◽  
Vol 58 (19) ◽  
pp. 8472-8483
Author(s):  
Li Niu ◽  
Zhimin Chu ◽  
Min Cai ◽  
Mengxi Liu
Keyword(s):  
Fluidized Bed ◽  
Force Balance ◽  
Balance Model
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