Wall class

Contents

Description

This is a handle heterogeneous super-class for the definition of rigid walls.

Rigid walls are not solved with mechanical and / or thermal equilibrium equations. Their motion and / or temperature are not influenced by their interactions with other elements.

A wall may or may not have an assigned solid material. If it does, the effective interaction properties take into account the material properties from both the wall and the particle. Otherwise, the effective interaction properties for the mechanical behavior are set as the particle material, and the wall is considered insulated (no heat exchange with particles).

This super-class defines abstract methods that must be implemented in the derived sub-classes:

classdef Wall < handle & matlab.mixin.Heterogeneous

Constant values

    properties (Constant = true, Access = public)
        % Types of wall
        LINE   = uint8(1);
        CIRCLE = uint8(2);
    end

Public properties

    properties (SetAccess = public, GetAccess = public)
        % Identification
        type uint8  = uint8.empty;    % flag for type of wall
        id   uint32 = uint32.empty;   % identification number

        % Physical properties
        material Material = Material.empty;   % handle to object of Material_Solid subclass

        % Behavior flags
        fixed_motion logical = logical.empty;   % flag for fixed motion wall
        fixed_therm  logical = logical.empty;   % flag for fixed temperature wall
        insulated    logical = logical.empty;   % flag for insulated wall (no heat transfer with particles)

        % Fixed conditions (handles to objects of Condition class)
        fc_translation Condition = Condition.empty;
        fc_rotation    Condition = Condition.empty;
        fc_temperature Condition = Condition.empty;

        % Current mechanical state
        veloc_trl double = double.empty;   % translational velocity
        veloc_rot double = double.empty;   % rotational velocity

        % Current thermal state
        temperature double = double.empty;
    end

Constructor method

    methods
        function this = Wall(type)
            if (nargin > 0)
                this.type = type;
            end
        end
    end

Default sub-class definition

    methods (Static, Access = protected)
        function defaultObject = getDefaultScalarElement
            defaultObject = Wall_Line;
        end
    end

Abstract methods: implemented in derived sub-classes

    methods (Abstract)
        %------------------------------------------------------------------
        setDefaultProps(this);

        %------------------------------------------------------------------
        setFCMotion(this,time,dt);

        %------------------------------------------------------------------
        [x1,y1,x2,y2] = getBBoxLimits(this);
    end

Public methods

    methods
        %------------------------------------------------------------------
        function setFixedMotion(this,time)
            if (isempty(this.fc_translation) && isempty(this.fc_rotation))
                this.fixed_motion = false;
            else
                for i = 1:length(this.fc_translation)
                    if (this.fc_translation(i).isActive(time))
                        this.fixed_motion = true;
                        return;
                    end
                end
                for i = 1:length(this.fc_rotation)
                    if (this.fc_rotation(i).isActive(time))
                        this.fixed_motion = true;
                        return;
                    end
                end
            end
        end

        %------------------------------------------------------------------
        function setFixedThermal(this,time)
            if (isempty(this.fc_temperature))
                this.fixed_therm = false;
            else
                for i = 1:length(this.fc_temperature)
                    if (this.fc_temperature(i).isActive(time))
                        this.fixed_therm = true;
                        return;
                    end
                end
            end
        end

        %------------------------------------------------------------------
        function setFCTemperature(this,time)
            if (~this.fixed_therm)
                return;
            end
            for i = 1:length(this.fc_temperature)
                if (this.fc_temperature(i).isActive(time))
                    this.temperature = this.fc_temperature(i).getValue(time);
                end
            end
        end
    end

end

Published with MATLAB® R2019b