LES of Particle-laden Turbulent FlowsAbstract: The focus was to predict the interaction between turbulent flows and discrete drops or particles. Applications include spray combustion, paint spray, and other particulate flows. The first study involves the spatial and thermal dynamics of particles in a nonpremixed reacting jet, as a step towards simulating spray flames. Particles colored by their temperature in a planar reacting jet
Instantaneous snapshot of non-isothermal fluid particle trajectories in an idealized nonpremixed jet flame People
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Numerical Modeling and Simulation of Cavitation Inceptionin Submerged JetsAbstract: Cavitation occurs in a wide range of engineering applications. It typically occurs in regions of low pressure where vaporous or gaseous bubbles become dynamically active. It is usually undesirable due to its role a flow noise source and its potential for erosion damage due to imploding bubbles. Improved modeling and simulation of cavitation can help design better devices to effect cavitation control. The image below is from two-dimensional laminar simulations of submerged jet cavitation showing influence of cavitation on the jet vortex dynamics. Current studies involve LES of 3D turbulent jets and are exploring passive and active control mechanisms.
The work was originally sponsored by Caterpillar, Inc. People
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Numerical modeling of two-phase flow in a refrigeration flow distribution deviceAbstract: In HVAC&R applications, distribution of two-phase flow is common, such as in expansion devices of refrigeration or air conditioning systems. Maldistribution of flow and phase can occur and proper designs should minimize this to improve heat exchanger performance and overall COP. FLUENT was used to explore and develop an improved device. A typical flow field result showing velocity vectors and void fraction contours is shown below highlighting the maldistribution problem.
The work was sponsored by Aeroquip Inc. and resulted in an improved design with a pending patent. People
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