David Sondak

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A new eddy viscosity model for the large eddy simulation of turbulent flows is developed. The eddy viscosity is proportional to the product of the magnitude of the fine scale velocity and the grid size. The residual based variational multiscale formulation is used to obtain a computationally inexpensive approximation for the fine scale velocity field. It is(More)
The problem brought to the 2010 Mathematical Problems in Industry Workshop by Corning Incorporated involved a manufacturing process for the production of high-quality thin glass sheets for many commercial applications (large screen video displays for example). The process begins with hot molten glass flowing out of an apparatus (essentially an overflowing(More)
Artificial phoretic particles swim using self-generated gradients in chemical species (self-diffusiophoresis) or charges and currents (self-electrophoresis). These particles can be used to study the physics of collective motion in active matter and might have promising applications in bioengineering. In the case of self-diffusiophoresis, the classical(More)
When designing the control loops for tokamaks, it is important to acknowledge the effects of time delays. An assumption sometimes made for tokamaks having superconducting coils is that these extra time delays will not have any undesirable effects on control. In fact, introducing extra delays into the axisymmetric control loops of certain supercon-ducting(More)
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