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 Timestamp:

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

karpeev
 Comment:


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v11

v12


37  37  Existing components are dark, components to be added or extended with new capabilities are in lighter colors. 
38  38  
 39  * '''Model''' defines the core nonlinear equations to be ''used'' in different simulation scenarios. 
 40  * The actual equations to be ''solved'' are defined in terms of the model according to the simulation needs: 
 41  * '''Spin up''': equilibration of the core equations with the other models (ocean, atmosphere) fixed in their current states. 
 42  * '''Transient''': time stepping through the ice sheet dynamics above the stiff time scales. 
 43  * '''Bifurcation''': parameter continuation and/or bifurcation identification and tracking 
 44  * '''Inverse''': data assimilation and inverse problem solution to identify the model parameters. 
39  45  
 46  * Model and the overlaid simulation scenario define the nonlinear system to be solved (generally, one per time or parameter step). 
 47  * Nonlinear residuals and the (action of) the (approximate) Jacobian of the system are formed by the model. 
 48  * SNES (Newton's method) solves the nonlinear system. 
 49  * KSP carries out the inner linear (iterative) solve using the supplied Jacobian action. 
 50  * PC preconditions the system to ensure rapid KSP convergence. 
 51  
 52  * [Need to expand on the mesh movement etc] 
 53  
 54  * [Need to expand on the physicsbased/splitting preconditioners] 
40  55  
41  56  