Mixing is a unit operation that combines two or more components into a homogeneous mixture. This work involves mixing two viscous liquid streams using an in-line static mixer. The mixer is a split-and-recombine design that employs shear and extensional flow to increase the interfacial contact between the components. A prototype split-and-recombine (SAR) mixer was constructed by aligning a ser...

This paper provides an overview of recent advances in the theoretical modeling and numerical simulation of cryogenic fluid injection and mixing in transcritical and supercritical environments. The basis of the analysis is a general theoretical and numerical framework that accommodates full conservation laws and real-fluid thermodynamic and transport phenomena. All of the thermophysical properti...

A two-phase subgrid combustion model has been developed for large-eddy simulations (LES). This approach includes a more fundamental treatment of the effects of the final stages of droplet vaporization, molecular diffusion, chemical reactions and small scale turbulent mixing than other LES closure techniques. In the present approach, the liquid droplets are tracked using the Lagrangian approach ...

This paper reports on the CFD study of macro-mixing process of Rushton turbine in stirred tank. The code for mixing calculation is developed in the commercial CFD code CFX4.3. Mixing process simulation on different calculation method, different turbulent model and different tracer adding and detecting position are calculated. The simulation is three-dimensional and the impeller region is explic...

An analysis of the strati®cation decay in thermally strati®ed vertical cylindrical cool storage systems is presented using a one dimensional conjugate heat conduction model. The degree of thermal strati®cation depends upon the length to diameter ratio, wall thickness to length ratio, the thermo-physical properties of the material of the storage tank, the type and thickness of the insulation and...

Transportation assume no liability for the contents or use thereof. The contents do not necessarily reflect the official views or policies of the State of California or the Department of Transportation. This report does not constitute a standard, specification, or regulation. Abstract The effects of ring injectors on the performance of a selective catalytic reduction (SCR) system have been inve...

A new micromixer incorporating integrated electrodes deposited on the bottom surface of a glass/ PDMS microchannel is used to induce a localized, perpendicular electric field within pressure driven axial flow. The presence of the electric field drives electro-osmotic flow in the transverse direction along the channel walls, creating helical motion that serves to mix the fluid. A numerical model...

We present results from an experimental investigation of turbulent transport and molecular mixing of a Sc S 1 conserved scalar in the fully developed self-similar far field of a steady, axisymmetric, momentum-driven, free turbulent jet issuing into a quiescent medium. Our experiments cover the axial range from the jet exit to 350 diameters downstream, and span the range of Reynolds numbers from...

The article deals with the issue of experimental research so-called design overloaded stage. A new device enabling measurements on two-stage axial turbine is advantageously used in this task. setup designed so that a preparatory stage included front examined introduces some aerodynamic overload already flow path phase. This program focused primarily effect leakage flows and their mixing mainstr...

Friction stir welding (FSW) is employed for of aluminium metal matrix composite (MMC) reinforced with zirconium dioxide and Graphite as the reinforcing element. Stir casting used mixing MMC The specimens are fabricated in form rectangular plates then welded using FSW process. process parameters considered this work are; tool rotational speed, speed axial load. tensile strength hardness weld nug...