Sundials Solvers
The Sundials solvers are part of a freely available third-party
package developed at Lawrence Livermore
National Laboratory. All the other ODE solvers used for simulation
of SimBiology models, such as ode45, and ode15s,
are part of the MATLAB ODE suite. At a fundamental level the
core algorithms for the Sundials solvers are similar to those for
some of the solvers in the MATLAB ODE suite and work in the same
way, as described in How Solvers Work
When you select the SolverType Sundials,
the software automatically chooses one of two Sundials solvers as
appropriate for your model: CVODE or IDA. CVODE is a solver for systems
of ODEs, both nonstiff and stiff. This is used when a model has no
algebraic rules. IDA is a differential-algebraic equation (DAE) solver,
used when one or more algebraic rules are present.
If your model has events and you want to simulate with a deterministic
solver, you must select Sundials. The other
ODE solvers do not support events.
For more information on the Sundials solvers, see the web site http://www.llnl.gov/casc/sundials/description/description.html.
 | Stochastic Solvers | | Analysis |  |
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