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Add explicit Runge-Kutta-2 time integration scheme #1929

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andrsd opened this issue Feb 14, 2014 · 5 comments
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Add explicit Runge-Kutta-2 time integration scheme #1929

andrsd opened this issue Feb 14, 2014 · 5 comments
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C: Framework P: normal A defect affecting operation with a low possibility of significantly affects. T: task An enhancement to the software.

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andrsd commented Feb 14, 2014

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@ghost ghost assigned andrsd Feb 14, 2014
@andrsd andrsd closed this as completed Feb 14, 2014
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andrsd commented Feb 14, 2014

In 9ad83e8:

Adding explicit Runge-Kutta-2 (closes #1929)

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andrsd commented Feb 14, 2014

In 54a2172:

Fixing typo in RK2 test (refs #1929)

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andrsd commented Feb 14, 2014

In c355dde:

Fixing uninitialized value (refs #1929)

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andrsd commented Feb 14, 2014

In d1f3bab:

Fixing RK-2 (refs #1929)

The scheme was using F^{n} in stage 2 instead of F^{1/2}

+ adding a new test
- re-golding 2D rk2 test (b/c of the bug fix)

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andrsd commented Feb 14, 2014

In 47b7952:

RK-2 fixes (refs #1929)

+ set solver defaults before stage 2
+ while the jacobian is not recomputed, the first stage of RK has to be in form: J = -1/2 F^{n}

andrsd added a commit that referenced this issue Feb 14, 2014
@andrsd @permcody
Adding explicit Runge-Kutta-2 (closes #1929)
9ad83e8 
r19390
andrsd added a commit that referenced this issue Feb 14, 2014
@andrsd @permcody
Fixing typo in RK2 test (refs #1929)
54a2172 
r19392
andrsd added a commit that referenced this issue Feb 14, 2014
@andrsd @permcody
Fixing uninitialized value (refs #1929)
c355dde 
r19412
andrsd added a commit that referenced this issue Feb 14, 2014
@andrsd @permcody
Fixing RK-2 (refs #1929)
d1f3bab 
The scheme was using F^{n} in stage 2 instead of F^{1/2}

+ adding a new test
- re-golding 2D rk2 test (b/c of the bug fix)

r22416
andrsd added a commit that referenced this issue Feb 14, 2014
@andrsd @permcody
RK-2 fixes (refs #1929)
47b7952 
+ set solver defaults before stage 2
+ while the jacobian is not recomputed, the first stage of RK has to be in form: J = -1/2 F^{n}

r22562
jwpeterson added a commit to jwpeterson/moose that referenced this issue Sep 15, 2015
@jwpeterson
Add explicit Heun, Ralston, and Midpoint time integration methods.
78842f5 
* These three methods have a common ExplicitRK2 base class.
* The original RungeKutta2 method is equivalent to ExplicitMidpoint.
* Improve documentation.

Refs idaholab#1929.
jwpeterson added a commit to jwpeterson/moose that referenced this issue Sep 15, 2015
@jwpeterson
Deprecate RungeKutta2.
1d50fbe 
During the deprecation period, we'll register the name RungeKutta2
with ExplicitMidpoint, since that's what it is.

Refs idaholab#1929.
jwpeterson added a commit to jwpeterson/moose that referenced this issue Sep 15, 2015
@jwpeterson
Add convergence tests for Heun, Ralston, ExplicitMidpoint, and Implic…
8482939 
…itMidpoint methods.

* Compare new explicit methods with ExplicitEuler, a lower-order method.
* Add Python script which plots the results of these tests.

Refs idaholab#1929.
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