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Non-linear modal interactions in the oscillations of a liquid drop in a gravitational "eld
Liquid drop Modal interactions Bifurcations
2015/8/27
Non-linear modal interactions in the dynamics of a vibrating drop are examined. The partial di!erential equations governing the drop vibrations are formulated assuming potential #ow and incompressibil...
Limit Cycle Oscillations in CW Laser-Driven NEMS
Finite element method (FEM) laser drive limit cycle oscillation self-oscillation thermal stress
2015/8/27
Limit cycle, or self-oscillations, can occur in a variety of NEMS devices illuminated within an interference field. As the device moves within the field, the quantity of light absorbed and hence the r...
Mitigating horizontal divergence ‘‘checker-board’’ oscillations on unstructured triangular C-grids for nonlinear hydrostatic and nonhydrostatic flows
Unstructured mesh modeling Triangular C-grid Implicit (elliptic) and explicit filtering Horizontal divergence error Secondary circulation
2015/6/30
A complication of finite-volume triangular C-grid methods is the numerical emergence of horizontal divergence errors that lead to grid-scale oscillations in vertical velocity. Nonlinear feedback via a...