The present study investigated the feasibility of bioCO(2) sequestration using Chlorella sorokiniana. It was found that 5% CO(2) (v/v) in air was the most suitable concentration for the growth of this organism. At this concentration, the maximum rate of CO(2) sequestered and the biomass obtained were found to be 1.21 g L(-1)d(-1) and 4.4 g L(-1) respectively. Modeling and simulation of the grow...

A three-dimensional model of a circulating fluidized bed gasifier was developed, which uses continuous radial profiles of velocities and solids hold-up with regard to the description of fluid mechanics. A complex reaction network of sewage sludge gasification is included in the model. In the simulation calculations the influence of the axial location and the number of feeding points was examine...

We investigate the role of stellar axial rotation on the nitrogen nucleosynthesis at low metallicities Z. For this purpose, we have calculated models with initial masses between 2 and 60 M⊙ at Z=0.00001 from the zero age sequence to the phase of thermal pulses for models below or equal to 7 M⊙, and up to the end of central C–burning for the more massive stars. The models include all the main ph...

A hybrid method for the simulation of Reynolds-averaged turbulent ̄ows in axial ̄ow impeller driven mixing vessels is described. The time-mean ̄ow in the impeller region is modelled using blade element theory, while the ̄ow in the remainder of the vessel is simulated using a second-order ®nite-volume Reynolds-averaged numerical scheme. The two models are iteratively coupled through boundary con...

This article discusses the jet mixing effectiveness of rectangular tab with slots to distort jet, thereby creating vortices differing sizes enhance mixing. numerically investigates slanted slotted/perforated tabs slot connecting adjacent faces control Mach 0.4 jet. To intensify process, two similar equal blockage ratio 7% are placed at diametrically opposite locations convergent nozzle exit. Th...

A steady source of buoyancy creates a plume. Experi­ mental and theoretical studies of plumes have been mainly concerned with the far-field (self-similar) velocity and den­ sity profiles. •-3 Yet in many practical situations, knowledge regarding the rate of molecular scale mixing of the buoyant fluid with its environment is needed. This is especially true in the context of atmospheric studies, ...

The four LEP experiments and the SLD detector have measured the Z partial widths in the processes ee→Z→bb and ee→Z→cc and the corresponding forward-backward asymmetries at centre-of-mass energies close to mZ. The results yield a very precise determination of the effective vector and axial-vector coupling constants and of the underlying electroweak mixing angle sinθ lept eff , probing the Standa...

Pseudoscalar mesons and glueballs are studied in a model based on the AdS/QCD correspondence. Glueball masses obtained pure-gauge case, while mixing between pseudoscalar singlet produces expected mass of η′ meson. The topological susceptibility is computed as function quark mass. reproduces partial conservation axial current, anomaly equation, Witten-Veneziano relation.

In this paper, we examine the movement of particles within a continuous powder mixer using PEPT (Positron Emission Particle Tracking). The benefit of the approach is that the particle movement along the vessel can be measured non-invasively. The effect of impeller rotation rate, powder flow rate, and powder cohesion on the particle trajectory, dispersive axial transport coefficient, and residen...

An axisymmetric jet issued from a sharp edged circular convergent nozzle has been studied experimentally in the near field at Reynolds number 5.3x104  to search the saddle shape behavior of mean velocity and the role of mean static pressure in the jet flow. Due to the vena contracta effect the centerline mean velocity of the jet increases about 4.2% of its exit value and corresponding decrease ...