Applied/ACMS/Spring2025

Spring 2025

date	speaker	title	host(s)
Feb 2	Chris Rycroft (UW)	The reference map technique for simulating complex materials and multi-body interactions
Feb 9	Scott Weady (Flatiron Institute)	Entropy methods in active suspensions	Saverio and Laurel
Mar 29	Spring break

Abstracts

Chris Rycroft (UW–Madison)

Title: The reference map technique for simulating complex materials and multi-body interactions

Conventional computational methods often create a dilemma for fluid–structure interaction problems. Typically, solids are simulated using a Lagrangian approach with grid that moves with the material, whereas fluids are simulated using an Eulerian approach with a fixed spatial grid, requiring some type of interfacial coupling between the two different perspectives. Here, a fully Eulerian method for simulating structures immersed in a fluid will be presented [1]. By introducing a reference map variable to model finite-deformation constitutive relations in the structures on the same grid as the fluid, the interfacial coupling problem is highly simplified. The method is particularly well suited for simulating soft, highly-deformable materials and many-body contact problems [2], and several examples in two and three dimensions [3] will be presented.