Bubble population balance modelling for stationary and rotating columns under zero-gravity environment: Numerical study

Stationary axisymmetric and slowly rotating spacetimes in Hořava-Lifshitz gravity.

Stationary, axisymmetric, and slowly rotating vacuum spacetimes in the Hořava-Lifshitz (HL) gravity are studied, and it is shown that, for any given spherical static vacuum solution of the HL theory (of any model, including the ones with an additional U(1) symmetry), there always exists a corresponding slowly rotating, stationary, and axisymmetric vacuum solution, which reduces to the former, w...

Adaptation in a rotating artificial gravity environment.

The centripetal force generated by a rotating space vehicle is a potential source of artificial gravity. Minimizing the cost of such a vehicle dictates using the smallest radius and highest rotation rate possible, but head movements made at high rotation rates generate disorienting, nauseogenic cross-coupled semicircular canal stimulation. Early studies suggested 3 or 4 rpm as the highest rate ...

Numerical modelling of arsenic release in groundwater under reducing environment

A mathematical model is developed to predict the arsenic release in groundwater under reducing environment. The transport part of the model solves the transient convection dispersion differential equations. The kinetic sub-model describes the heterotrophic metabolisms of several groups of micro-organisms. To model a complete redox sequence (aerobic bacteria or denitrifiers, Mn(IV)-reduction, Fe...

Numerical simulation of a collapsing bubble subject to gravity

The present paper focuses on the simulation of the expansion and aspherical collapse of a laser-generated bubble subjected to an acceleration field and comparison of the results with instances from high-speed videos. The interaction of the liquid and gas is handled with the Volume Of Fluid (VOF) method. Compressibility effects have been included for each phase to predict the propagation of pres...

Three-dimensional mathematical modeling of dispersed two-phase flow using class method of population balance in bubble columns