Changes between Version 11 and Version 12 of WikiStart

Timestamp:

12/16/09 15:18:48 (13 years ago)

Author:

karpeev

Comment:

--

WikiStart

@@ -37 +37 @@
 Existing components are dark, components to be added or extended with new capabilities are in lighter colors.
 
+ *  '''Model''' defines the core nonlinear equations to be ''used'' in different simulation scenarios.
+ *  The actual equations to be ''solved'' are defined in terms of the model according to the simulation needs:
+   * '''Spin up''': equilibration of the core equations with the other models (ocean, atmosphere) fixed in their current states.
+   * '''Transient''': time stepping through the ice sheet dynamics above the stiff time scales.
+   * '''Bifurcation''': parameter continuation and/or bifurcation identification and tracking
+  * '''Inverse''': data assimilation and inverse problem solution to identify the model parameters.
 
+ *  Model and the overlaid simulation scenario define the nonlinear system to be solved (generally, one per time or parameter step).
+   * Nonlinear residuals and the (action of) the (approximate) Jacobian of the system are formed by the model.
+   * SNES (Newton's method) solves the nonlinear system.
+   * KSP carries out the inner linear (iterative) solve using the supplied Jacobian action.
+   * PC preconditions the system to ensure rapid KSP convergence.
+
+ *  [Need to expand on the mesh movement etc]
+
+ *  [Need to expand on the physics-based/splitting preconditioners]