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annotate +time/RungekuttaRV.m @ 853:cda996e64925 feature/burgers1d

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Minor renaming and clean up
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 12 Oct 2018 08:41:57 +0200
parents ab2e5a24ddde
children e0560bc4fb7d
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846
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
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1 classdef RungekuttaRV < time.Timestepper
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2 properties
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3 F % RHS of the ODE
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4 k % Time step
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5 t % Time point
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6 v % Solution vector
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7 n % Time level
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8 RV % Residual Viscosity
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9 coeffs % The coefficents used for the RK time integration
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10 end
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11
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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12 methods
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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13 function obj = RungekuttaRV(F, k, t0, v0, RV, order)
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14 obj.F = F;
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15 obj.k = k;
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16 obj.t = t0;
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17 obj.v = v0;
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18 obj.n = 0;
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19 obj.RV = RV;
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20 % Extract the coefficients for the specified order
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21 % used for the RK updates from the Butcher tableua.
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22 [s,a,b,c] = time.rk.butcherTableau(order);
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23 obj.coeffs = struct('s',s,'a',a,'b',b,'c',c);
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24 end
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25
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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26 function [v, t] = getV(obj)
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27 v = obj.v;
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28 t = obj.t;
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29 end
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30
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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31 function state = getState(obj)
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32 [residual, u_t, grad_f] = obj.RV.getResidual();
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33 state = struct('v', obj.v, 'residual', residual, 'u_t', u_t, 'grad_f', grad_f, 'viscosity', obj.RV.getViscosity(), 't', obj.t);
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c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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34 end
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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35
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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36 function obj = step(obj)
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37 obj.v = time.rk.rungekuttaRV(obj.v, obj.t, obj.k, obj.F, obj.RV, obj.coeffs);
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38 obj.t = obj.t + obj.k;
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39 obj.n = obj.n + 1;
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40 end
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41 end
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c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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43
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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44 methods (Static)
c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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45 function k = getTimeStep(lambda)
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46 k = rk4.get_rk4_time_step(lambda);
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47 end
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48 end
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49
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50 end