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view +sbp/D1Upwind.m @ 577:e45c9b56d50d feature/grids

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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 e1d11b6a68d8
children 111fcbcff2e9
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classdef D1Upwind < sbp.OpSet
    properties
        Dp, Dm % SBP operator approximating first derivative
        H % Norm matrix
        HI % H^-1
        e_l % Left boundary operator
        e_r % Right boundary operator
        m % Number of grid points.
        h % Step size
        x % grid
        borrowing % Struct with borrowing limits for different norm matrices
    end

    methods
        function obj = D1Upwind(m,lim,order)

            x_l = lim{1};
            x_r = lim{2};
            L = x_r-x_l;
            obj.h = L/(m-1);
            obj.x = linspace(x_l,x_r,m)';

            switch order
                case 2
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_2(m,obj.h);
                case 3
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_3(m,obj.h);
                case 4
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_4(m,obj.h);
                case 5
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_5(m,obj.h);
                case 6
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_6(m,obj.h);
                case 7
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_7(m,obj.h);
                case 8
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_8(m,obj.h);
                case 9
                    [obj.H, obj.HI, obj.Dp, obj.Dm, obj.e_l, obj.e_r] = ...
                        sbp.implementations.d1_upwind_9(m,obj.h);
                otherwise
                    error('Invalid operator order %d.',order);
            end

            obj.m = m;
        	obj.borrowing = [];

        end

        function str = string(obj)
            str = [class(obj) '_' num2str(obj.order)];
        end
    end


end