Quasi‐Newton waveform iteration for partitioned surface‐coupled multiphysics applications

Partitioned External-Memory Value Iteration

Dynamic programming methods (including value iteration, LAO*, RTDP, and derivatives) are popular algorithms for solving Markov decision processes (MDPs). Unfortunately, however, these techniques store the MDP model extensionally in a table and thus are limited by the amount of main memory available. Since the required space is exponential in the number of domain features, these dynamic programm...

Multiphysics Applications of Ace3p∗

The TEM3P module of ACE3P, a parallel finite-element electromagnetic code suite from SLAC, focuses on the multiphysics simulation capabilities, including thermal and mechanical analysis for accelerator applications. In this paper, thermal analysis of coupler feedthroughs to superconducting rf (SRF) cavities will be presented. For the realistic simulation, internal boundary condition is implemen...

Efficient Value Iteration Using Partitioned Models

In order to solve large-scale value iteration problems, more intelligent allocation of computing time is needed. We introduce the idea of an information frontier, which allows us to identify maximally productive regions of the problem space. We present a potential information flow metric which allows us to quantify the frontier precisely. We also introduce a partitioning scheme, which effective...

Waveform Iteration and One-sided Lipschitz Conditions

Preconditioning Strategies For Multiphysics Applications: Some Problems

When modeling chemical processes we are concerned with mathematical models of more and more complexity: it is especially the coupling of equations describing different physical phenomena which adds a new level of complexity to the already present difficulties (3D domains, singular perturbations, heavy nonlinearities). In turn, this gives rise to an intolerable large computation time. In the pre...