Test

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Zeile 1: Zeile 1:
<jsxgraph box="jxgbox" width="500" height="500">
<jsxgraph box="jxgbox" width="500" height="500">
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var board = JXG.JSXGraph.initBoard("jxgbox", {boundingbox: [-5, 8, 12, -5], axis:true});
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        var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-5,5,5,-5], axis:true});
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// Erstelle den linken Wärmetauscher
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        // Define the metal plate as a polygon
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var heatexchanger1 = board.create('curve', [[0,0], [3,3], [6,3], [6,6], [3,6], [0,9], [-3,6], [-3,3], [0,0]], {strokeColor:'black', fillColor:'green', fillOpacity:0.5});
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        var polygon = board.create('polygon', [[-4,-4], [-4,4], [4,4], [4,-4]], {fillcolor:'#ddd', hasInnerPoints:true});
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</jsxgraph>
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        // Define the initial temperature distribution as a function of x and y
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    // Erstelle den rechten Wärmetauscher
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        function initialTemp(x,y) {
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    var heatexchanger2 = board.create('curve', [[8,0], [11,3], [14,3], [14,6], [11,6], [8,9], [5,6], [5,3], [8,0]], {strokeColor:'black', fillColor:'green', fillOpacity:0.5});
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            return 20 + 10*Math.sin(Math.PI*x/4)*Math.sin(Math.PI*y/4);
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        }
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    // Erstelle die Trennwand
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    var wall = board.create('line', [[6,0], [6,9]], {strokeColor:'#000', strokeWidth:4});
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        // Define the temperature function as a function of x and y and time
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        function temp(x,y,t) {
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    // Erstelle die Temperaturmesspunkte
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            var k = 1;
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    var temp1 = board.create('glider', [2,2,heatexchanger1], {strokeColor:'#00f', fillColor:'#00f', size:10, name:'T1'});
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            var c = 1;
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    var temp2 = board.create('glider', [10,2,heatexchanger2], {strokeColor:'#f00', fillColor:'#f00', size:10, name:'T2'});
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            var rho = 1;
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            var alpha = k/(rho*c);
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    // Berechne die Temperaturdifferenz
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            return initialTemp(x,y) + 10*Math.exp(-alpha*Math.PI*Math.PI*t/16)*Math.sin(Math.PI*x/4)*Math.sin(Math.PI*y/4);
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    var deltaT = board.create('segment', [temp1, temp2], {strokeColor:'#000', strokeWidth:2});
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        }
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    var label = board.create('text', [8, 7, function(){return 'ΔT = ' + Math.abs(temp1.Y() - temp2.Y()).toFixed(1) + ' K';}], {fontSize:18});
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        // Create a grid of points to sample the temperature function
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//board.update();
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        var points = [];
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        for (var i=-4; i<=4; i+=0.5) {
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            for (var j=-4; j<=4; j+=0.5) {
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                points.push([i,j]);
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            }
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        }
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 +
        // Plot the temperature distribution at time t=0
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        var heatmap = board.create('polygon', [points, initialTemp], {colorscheme:'greyscale', minopacity:0.5});
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 +
        // Animate the temperature distribution over time
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        var time = 0;
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        var dt = 0.1;
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        var interval = setInterval(function() {
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            time += dt;
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            var values = [];
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            for (var i=0; i<points.length; i++) {
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values.push(temp(points[i][0], points[i][1], time));
 +
    }
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heatmap.updateData(values);
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            if (time >= 2) clearInterval(interval);
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        }, 100);
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 +
 
</jsxgraph>
</jsxgraph>

Aktuelle Version vom 10:28, 7. Apr. 2023

Von „https://www.technikundkultur.de/wiki1/index.php5?title=Test“
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