Hyperbolic Module

Classes
class	ryujin::HyperbolicModule< Description, dim, Number >

Enumerations
enum class	ryujin::IDViolationStrategy : std::uint8_t { ryujin::IDViolationStrategy::warn , ryujin::IDViolationStrategy::raise_exception }

Detailed Description

This module contains classes and functions used during different stages of the explicit hyperbolic update performed in HyperbolicModule::step().

Enumeration Type Documentation

IDViolationStrategy

enum class ryujin::IDViolationStrategy : std::uint8_t

strong

An enum controlling the behavior on detection of an invariant domain or CFL violation. Such a case might occur for either aggressive CFL numbers > 1, and/or later stages in the Runge Kutta scheme when the time step tau is prescribed.

The invariant domain violation is detected in the limiter and implies that the low-order update itself lies outside the invariant domain.

A "CFL violation" occurs if the computed tau_max of a substep is significantly larger than the previously computed time step size tau with which we perform the update.

Note

Data structures in HyperbolicModule are initialized with the ensemble subrange communicator stored in MPIEnsemble. However, the time step size constraint (i.e. tau_max) is synchronized over the entire global communicator.

Enumerator
warn	Warn about an invariant domain violation but take no further action.
raise_exception	Raise a Restart exception on domain violation. This exception can be caught in TimeIntegrator and various different actions (adapt CFL and retry) can be taken depending on chosen strategy.

Definition at line 47 of file hyperbolic_module.h.