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2012-10-09 - Christina Hamlet


Time/Place:

Tuesday, October 09, 2012
3:00pm
101 Stanley Thomas Hall
Tulane University (Uptown)

Refreshments will be served


Speaker:

Christina Hamlet, Center for Computational Science, Tulane University


Title:

Modeling and simulation of fluid flow around the bell of the upside-down jellyfish, Cassiopea xamachana


Abstract:

We examine the fluid dynamics of feeding and particle exchange in the upside down jellyfish (Cassiopea sp.) using computational fluid dynamics and experiments with live animals. To solve the Navier-Stokes equations coupled to an immersed, flexible boundary representing the bell of a jellyfish we use a classic version of the immersed boundary method. The oral arms of the jellyfish which protrude over the bell and alter the flow are represented by a homogeneous porous structure. We compare our results to the flow produced by the live organism using particle image velocimetry (PIV) and dye visualization. The effect of the oral arms on vortex formation and on volumetric flow rates are also numerically simulated across a range of porosities and bell kinematics.

Center for Computational Science, Stanley Thomas Hall 402, New Orleans, LA 70118 ccs@tulane.edu