The point at which they meet (the triple junction) has prescribed angles which can be shown [12] to be defined by A coupled level set method for the motion of multiple junctions (of, e.g., solid, liquid, and grain boundaries), which follows the gradient flow for an energy functional consisting of su
Motion of Multiple Junctions: A Level Set Approach
โ Scribed by Barry Merriman; James K. Bence; Stanley J. Osher
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 783 KB
- Volume
- 112
- Category
- Article
- ISSN
- 0021-9991
No coin nor oath required. For personal study only.
โฆ Synopsis
A coupled level set method for the motion of multiple junctions is proposed. The new method extends the "Hamilton-Jacobi" level set formulation of Osher and Sethian. It retains the feature of tracking fronts by following level sets and allows the specification of arbitrary velocities on each front. The diffusion equation is shown to generate curvature dependent motion and this is used to develop an algorithm to move multiple junctions with curvature-dependent speed. Systems of reaction diffusion equations are shown to possess inherent properties which prohibit efficient numerical solutions when applied to curvaturedependent motion. 'c' 1994 Ac.ademic. Press, Inc.
๐ SIMILAR VOLUMES
The level-set method has been successfully applied to a variety of problems that deal with curves in R 2 or surfaces in R 3 . We present here a combination of these two cases, creating a level-set representation for curves constrained to lie on surfaces. We study primarily geometrically based motion
The level set method was originally designed for problems dealing with codimension one objects, where it has been extremely succesful, especially when topological changes in the interface, i.e., merging and breaking, occur. Attempts have been made to modify it to handle objects of higher codimension
where (x, y, z, t) is the vorticity vector and v(x, y, z, t) is the velocity vector. We present an Eulerian, fixed grid, approach to solve the motion of an incompressible fluid, in two and three dimensions, in which In a vortex sheet, is a singular measure concentrated the vorticity is concentrate