I will introduce and describe the state of the art in a new type of solar coronal simulation, "fluxon" modeling. If fluxons can be made to work, it is likely that visible active regions can be modeled in faster-than-real time by moderately powerful computers, allowing physics-based real-time flare prediction.

MHD simulation codes typically take one of two forms: Eulerian models, which use a straightforward fixed grid but include numerical diffusion terms that dominate the modeled reconnection rate; and Lagrangian models, which eliminate numerical diffusion but develop problems as the grid twists and shears to follow the fluid's motion. Fluxons are discretized field lines, which are allowed to interact with one another at a distance under the Lorenz force and other modeled forces. Fluxon model development is underway at both Southwest Research Institute and Montana State University.