Mercurial > repos > public > sbplib
annotate +time/Rk4SecondOrderNonlin.m @ 577:e45c9b56d50d feature/grids
Add an Empty grid class
The need turned up for the flexural code when we may or may not have a grid for the open water and want to plot that solution.
In case there is no open water we need an empty grid to plot the empty gridfunction against to avoid errors.
| author | Jonatan Werpers <jonatan@werpers.com> |
|---|---|
| date | Thu, 07 Sep 2017 09:16:12 +0200 |
| parents | cd2e28c5ecd2 |
| children | b5e5b195da1e c6fcee3fcf1b |
| rev | line source |
|---|---|
| 0 | 1 classdef Rk4SecondOrderNonlin < time.Timestepper |
| 2 properties | |
| 3 F | |
| 4 k | |
| 5 t | |
| 6 w | |
| 7 m | |
| 8 | |
| 9 D | |
| 10 E | |
| 11 S | |
| 12 | |
| 13 n | |
| 14 end | |
| 15 | |
| 16 | |
| 17 methods | |
| 18 function obj = Rk4SecondOrderNonlin(D, E, S, k, t0, v0, v0t) | |
|
1
5ae4f23d9130
Added CdiffNonlin timestepper. Probably fixed a bug with Cdiff. Added default arguments to Rk4SecondOrderNonlin.
Jonatan Werpers <jonatan@werpers.com>
parents:
0
diff
changeset
|
19 default_arg('S',0); |
|
5ae4f23d9130
Added CdiffNonlin timestepper. Probably fixed a bug with Cdiff. Added default arguments to Rk4SecondOrderNonlin.
Jonatan Werpers <jonatan@werpers.com>
parents:
0
diff
changeset
|
20 default_arg('E',0); |
| 0 | 21 |
|
30
cd2e28c5ecd2
Corrected parameter treatment in nonlin timesteppers.
Jonatan Werpers <jonatan@werpers.com>
parents:
28
diff
changeset
|
22 if isnumeric(S) |
|
cd2e28c5ecd2
Corrected parameter treatment in nonlin timesteppers.
Jonatan Werpers <jonatan@werpers.com>
parents:
28
diff
changeset
|
23 S = @(v,t)S; |
| 0 | 24 end |
| 25 | |
|
30
cd2e28c5ecd2
Corrected parameter treatment in nonlin timesteppers.
Jonatan Werpers <jonatan@werpers.com>
parents:
28
diff
changeset
|
26 if isnumeric(E) |
|
cd2e28c5ecd2
Corrected parameter treatment in nonlin timesteppers.
Jonatan Werpers <jonatan@werpers.com>
parents:
28
diff
changeset
|
27 E = @(v)E; |
| 0 | 28 end |
| 29 | |
| 30 obj.k = k; | |
| 31 obj.t = t0; | |
| 32 obj.w = [v0; v0t]; | |
| 33 | |
| 34 m = length(v0); | |
| 35 function wt = F(w,t) | |
| 36 v = w(1:m); | |
| 37 vt = w(m+1:end); | |
| 38 | |
| 39 % Def: w = [v; vt] | |
| 40 wt(1:m,1) = vt; | |
| 41 wt(m+1:2*m,1) = D(v)*v + E(v)*vt + S(v,t); | |
| 42 | |
| 43 end | |
| 44 | |
| 45 obj.F = @F; | |
| 46 obj.D = D; | |
| 47 obj.E = E; | |
| 48 obj.S = S; | |
| 49 obj.m = m; | |
|
13
b18d3d201a71
Fixed initialization of step counter in timesteppers.
Jonatan Werpers <jonatan@werpers.com>
parents:
1
diff
changeset
|
50 obj.n = 0; |
| 0 | 51 end |
| 52 | |
| 53 function [v,t] = getV(obj) | |
| 54 v = obj.w(1:end/2); | |
| 55 t = obj.t; | |
| 56 end | |
| 57 | |
| 58 function [vt,t] = getVt(obj) | |
| 59 vt = obj.w(end/2+1:end); | |
| 60 t = obj.t; | |
| 61 end | |
| 62 | |
| 63 function obj = step(obj) | |
| 64 obj.w = time.rk4.rungekutta_4(obj.w, obj.t, obj.k, obj.F); | |
| 65 obj.t = obj.t + obj.k; | |
| 66 obj.n = obj.n + 1; | |
| 67 end | |
| 68 end | |
| 69 | |
| 70 | |
| 71 methods (Static) | |
| 72 function k = getTimeStep(lambda) | |
| 73 k = rk4.get_rk4_time_step(lambda); | |
| 74 end | |
| 75 end | |
| 76 | |
| 77 end |