Now showing items 1-10 of 70
A pore-scale assessment of the dynamic response of forced convection in porous media to inlet flow modulations
An increasing number of technologies require prediction of unsteady forced convection in porous media when the inlet flow is unsteady. To gain further insight into this problem, the unsteady equations of continuity, Navier ...
Three-dimensional numerical modeling of free convection in sloping porous enclosures
Three-dimensional (3D) numerical simulations are carried out to study steady state free convection in a sloping porous enclosure heated from below. The model is based on Darcy’s law and the Boussinesq approximation. Two ...
Gas-phase transport and entropy generation during transient combustion of single biomass particle in varying oxygen and nitrogen atmospheres
Transient combustion of a single biomass particle in preheated oxygen and nitrogen atmospheres with varying concentration of oxygen is investigated numerically. The simulations are rigorously validated against the existing ...
The effects of exothermic catalytic reactions upon combined transport of heat and mass in porous microreactors
Microreactors for chemical synthesis and combustion have already attracted significant attention. Exothermic catalytic activity features heavily in these devices and thus advective-diffusive transport is of key importance ...
On the dissipation and dispersion of entropy waves in heat transferring channel flows
(AIP Publishing., 2017-08)
This paper investigates the hydrodynamic and heat transfer effects on the dissipation and dispersion of entropy waves in non-reactive flows. These waves, as advected density inhomogeneities downstream of unsteady flames, ...
State prediction of an entropy wave advecting through a turbulent channel flow
(Cambridge University Press (CUP), 2020-01-10)
Survival of entropy waves during their advection throughout a combustor is central to the generation of entropic sound and the subsequent effects upon thermoacoustic stability of the system. However, the decay and spatial ...
Heat and mass transfer and thermodynamic analysis of power-law fluid flow in a porous microchannel
Transfer of heat and mass and thermodynamic irreversibilities are investigated in a porous, parallel-plate microreactor in which the working fluid is non-Newtonian. The investigated microreactor features thick flat walls ...
Lift characteristics of two tandem airfoils in the globally unstable wake of a heated cylinder
In this numerical study, we use two-dimensional scale-adaptive simulations to investigate the lift characteristics of two tandem airfoils in the globally unstable wake of a cylinder at a Reynolds number of 104, with and ...
Understanding droplet collision with superhydrophobic-hydrophobic–hydrophilic hybrid surfaces
This study uses a two-phase finite volume method to investigate the dynamics of Newtonian and non-Newtonian droplets impacting onto hybrid surfaces with various wettabilities. Six configurations with different substrate ...
Modeling Validation of Tubing Compaction for Rigless Well Plug and Abandonment
(Society of Petroleum Engineers, 2020-06-01)