Accession Number : ADA617813


Title :   Space-Time Interface-Tracking Computations with Contact Between Solid Surfaces


Descriptive Note : Master's thesis


Corporate Author : RICE UNIV HOUSTON TX


Personal Author(s) : Buscher, Austin J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a617813.pdf


Report Date : Apr 2014


Pagination or Media Count : 93


Abstract : To address the computational challenges associated with contact between moving solid surfaces, such as those in cardiovascular fluid{structure interaction (FSI), parachute FSI, and flapping-wing aerodynamics, we introduce a space{time (ST) interface-tracking method that can deal with topology change (TC). In cardiovascular FSI, our primary target is heart valves. The method is a new version of the Deforming-Spatial-Domain/Stabilized ST (DSD/SST) method, and we call it ST-TC. It includes a master{slave system that maintains the connectivity of the \parent mesh when there is contact between the moving interfaces. It is an e efficient, practical alternative to using unstructured ST meshes, but without giving up on the accurate representation of the interface or consistent representation of the interface motion. We explain the method with conceptual examples and present 2D and 3D test computations with models representative of the classes of problems we are targeting.


Descriptors :   *COMPUTATIONS , *TOPOLOGY , *TRACKING , AERODYNAMICS , CONSISTENCY , CORONARY ARTERIES , GEOMETRY , HEART VALVES , INTERFACES , MESH , MODELS , MOTION , PARACHUTES , SOLID BODIES , SURFACES , TARGETS , THESES


Subject Categories : Aerodynamics
      Numerical Mathematics
      Theoretical Mathematics


Distribution Statement : APPROVED FOR PUBLIC RELEASE