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comparison +rv/+time/RungekuttaInteriorRv.m @ 1033:037f203b9bf5 feature/burgers1d

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Merge with branch feature/advectioRV to utilize the +rv package
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Thu, 17 Jan 2019 10:44:12 +0100
parents 2ef20d00b386
children 010bb2677230
comparison
equal deleted inserted replaced
854:18162a0a5bb5 1033:037f203b9bf5
1 classdef RungekuttaInteriorRv < time.Timestepper
2 properties
3 F % RHS of the ODE
4 k % Time step
5 t % Time point
6 v % Solution vector
7 n % Time level
8 coeffs % The coefficents used for the RK time integration
9 RV % Residual Viscosity
10 DvDt % Function for computing the time deriative used for the RV evaluation
11
12 % Convenience properties. Only for plotting
13 viscosity % Total viscosity
14 residualViscosity % Residual viscosity
15 firstOrderViscosity % first order viscosity
16 dvdt % Evaluated time derivative in residual
17 Df % Evaluated flux in residual
18 end
19
20 methods
21 function obj = RungekuttaInteriorRv(F, k, t0, v0, RV, DvDt, order)
22 obj.F = F;
23 obj.k = k;
24 obj.t = t0;
25 obj.v = v0;
26 obj.n = 0;
27 % Extract the coefficients for the specified order
28 % used for the RK updates from the Butcher tableua.
29 [s,a,b,c] = time.rk.butcherTableau(order);
30 obj.coeffs = struct('s',s,'a',a,'b',b,'c',c);
31 obj.RV = RV;
32 obj.DvDt = DvDt;
33 obj.dvdt = obj.DvDt(obj.v);
34 [obj.viscosity, obj.Df, obj.firstOrderViscosity, obj.residualViscosity] = obj.RV.evaluate(obj.v,obj.dvdt);
35 end
36
37 function [v, t] = getV(obj)
38 v = obj.v;
39 t = obj.t;
40 end
41
42 function state = getState(obj)
43 state = struct('v', obj.v, 'dvdt', obj.dvdt, 'Df', obj.Df, 'viscosity', obj.viscosity, 'residualViscosity', obj.residualViscosity, 'firstOrderViscosity', obj.firstOrderViscosity, 't', obj.t);
44 end
45
46 function obj = step(obj)
47 obj.v = rv.time.rungekuttaRV(obj.v, obj.t, obj.k, obj.F, obj.RV, obj.DvDt, obj.coeffs);
48 obj.t = obj.t + obj.k;
49 obj.n = obj.n + 1;
50 obj.dvdt = obj.DvDt(obj.v);
51 [obj.viscosity, obj.Df, obj.firstOrderViscosity, obj.residualViscosity] = obj.RV.evaluate(obj.v,obj.dvdt);
52 end
53 end
54 end