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312 lines
10 KiB
312 lines
10 KiB
function TurkeyLayer( name, percentRadius, turkeyModel, ovenModel ){ |
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var that = this; |
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this.name = name; |
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this.percentRadius=percentRadius; |
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this.initialTemp = 20; |
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this.waterLost = 0; |
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this.finalTemperature = 20; |
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this.cookCondition = "Raw"; |
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return { |
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updateTemperatureTick: function(){ |
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that.finalTemperature = UtilityFunctions.transientSphereSeries( turkeyModel.density, |
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turkeyModel.thermalConduct, |
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turkeyModel.heatConvection, |
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turkeyModel.cp, |
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percentRadius * turkeyModel.totalRadius, |
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turkeyModel.totalRadius, |
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that.initialTemp, |
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ovenModel.steadyTemp, |
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ovenModel.globalTime ); |
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that.waterLost = that.waterLost + UtilityFunctions.waterLoss( that.finalTemperature ); |
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that.cookCondition = UtilityFunctions.cookCondition(that.waterLost); |
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console.log( that.name + ": "+ that.waterLost + " " + that.cookCondition); |
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}, |
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resetLayerTemps: function(){ |
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that.initialTemp = that.finalTemperature; |
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}, |
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getCondition: function(){ |
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return that.cookCondition; |
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}, |
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getTemperature: function(){ |
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return that.finalTemperature; |
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} |
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} |
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} |
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function TurkeyModel( weight, ovenModel ){ |
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this.density = 1050; // kg/m3 Assuming Density of Water 1000 kg/m3 |
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this.cp = 2000; // 2810 J/kg K for Turkey. Extra is to semi-account for water evaporation energy |
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this.heatConvection = 9; // W/m2 K Some Reasonable estimate for natural Convection. Change as needed. 5-25 |
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this.thermalConduct = 0.412; // W/m K // Chicken |
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this.skin = {}; |
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this.body = {}; |
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this.core = {}; |
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this.totalRadius = UtilityFunctions.calculateRadius( weight, this.density ); |
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this.totalLayers = [ new TurkeyLayer("Skin", 0.85, this, ovenModel ), |
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new TurkeyLayer("Body", 0.45, this, ovenModel ), |
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new TurkeyLayer("Core", 0.01, this, ovenModel ) ]; |
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// Whenever temperature is changed |
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this.updateLayerTemps = function(){ |
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for (var i in this.totalLayers ){ |
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this.totalLayers[i].updateTemperatureTick(); |
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} |
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}; |
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this.resetLayerTemps = function(){ |
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for (var i in this.totalLayers ){ |
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this.totalLayers[i].resetLayerTemps(); |
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} |
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}; |
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} |
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function OvenModel( turkeyWeight, gameState ) { |
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var that = this; |
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this.tempInfini=20; //C |
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this.setTemp = 20; |
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this.steadyTemp = 20; |
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this.steadyTimer = 0; |
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this.globalTime = 0; |
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var turkey = new TurkeyModel(9.07185, this ); |
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var proportional = 0.004; // This value is arbitrary to how fast you want the temperatures to converge. (Or oscillate, which could be realistic as well) |
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var errorTolerance = 10; //Stove is accurate to 1 degree Celcius Should hopefully oscillate below that value. |
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// Equalize temp will need to be sent each time iteration |
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this.equalizeTemp= function(){ |
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var error = Math.abs(this.setTemp-this.tempInfini); |
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if( this.setTemp>this.tempInfini ){ |
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this.tempInfini = this.tempInfini + error*proportional; |
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} |
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else if( this.setTemp<this.tempInfini ){ |
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this.tempInfini = this.tempInfini - error*proportional; |
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} |
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if( error>errorTolerance ) { |
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if (this.steadyTimer>=80) { |
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//Reset the model's time calculation if there are major changes in the tolerance of the temperature or the steady timer expires |
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this.steadyTimer = 0; |
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this.steadyTemp = this.tempInfini |
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turkey.resetLayerTemps(); |
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this.globalTime = 0; |
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} |
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return(true); |
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} |
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} |
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return { |
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getTurkeyState: function(){ |
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return { |
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"skin" : { |
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"temp": turkey.totalLayers[0].getTemperature(), |
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"cond": turkey.totalLayers[0].getCondition() |
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}, |
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"body" : { |
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"temp": turkey.totalLayers[1].getTemperature(), |
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"cond": turkey.totalLayers[1].getCondition() |
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}, |
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"core" : { |
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"temp": turkey.totalLayers[2].getTemperature(), |
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"cond": turkey.totalLayers[2].getCondition() |
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} |
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}; |
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}, |
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changeTemp: function(setTemp){ |
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console.log("temp changed to " + setTemp); |
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that.setTemp = setTemp; |
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}, |
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secondTick: function(){ |
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that.globalTime = that.globalTime + 1; |
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that.steadyTimer = that.steadyTimer + 1; |
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if ( that.equalizeTemp() ) { |
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// Turn on oven light |
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gameState.pubsub.publish( "OvenLight", "On" ); |
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} |
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else { |
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that.steadyTemp = that.tempInfini; |
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// Turn off oven light |
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gameState.pubsub.publish( "OvenLight", "Off" ); |
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} |
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console.log("Steady Temp " + that.steadyTemp) |
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console.log("Steady Timer " + that.steadyTimer) |
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console.log("Oven Temp " + that.tempInfini ) |
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turkey.updateLayerTemps(); |
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} |
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} |
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} |
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UtilityFunctions = { |
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// Cache the lambda if the Biot number does not change, to avoid expensive root-finding operations |
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cachedBiot: null, |
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cachedLambda: null, |
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// Using Ratios for a rectangular Box Turkey |
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calculateRadius: function(weight, density) { |
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var ratioLvG=1.4; //1.4, Turkey length vs shoulder girth |
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var ratioLvH=2; //2, Turkey length vs height from resting position |
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var length = Math.pow(weight/((1/ratioLvG)*(1/ratioLvH)*density),(1/3)) |
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var depth = 1/(ratioLvG /length); |
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var height = 1/(ratioLvH /length); |
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var simpleRadius = length/2; //Doesn't take into account equal Volume |
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var rectangleVolume = depth*height*length; //m^3 Multiple by 1/4 to account for triangular shape and empty Space |
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var complexRadius = Math.pow(rectangleVolume/((4/3)*Math.PI), 1/3); //Volume of 3D Box = 3D Sphere |
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//console.log("Simple Radius " + simpleRadius + " Meters") |
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//console.log("Complex Radius " + complexRadius + " Meters") |
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return complexRadius; |
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}, |
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findAllRoots: function(min,max,splitsNum,Biot) { |
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var step = ( max - min ) / ( splitsNum - 1 ); |
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var answer; |
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var negativeTest; |
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var storage = []; |
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for (var i = step; i < max; i=i+step ) { |
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negativeTest = this.lambdaFormula(i-step, Biot)*this.lambdaFormula(i, Biot); |
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if (negativeTest <= 0) { |
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answer = this.bisectionMethod(i-step,i,Biot); |
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if (answer !=undefined) { |
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storage.push(answer); |
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} |
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} |
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else { |
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//console.log("No Bracketed Root " + negativeTest) |
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} |
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} |
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return storage; |
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}, |
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sphereVolume: function(radius) { |
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return((4/3)*Math.PI*Math.pow(radius,3)) |
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}, |
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waterLoss: function(temperature) { |
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return (Math.pow(10,(temperature-20)/80)-1) |
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}, |
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bisectionMethod: function(min,max,Biot) { |
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errorTolerance = (1/Math.pow(10,8)) |
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result = Infinity // some large value to ensure the calculation goes through. |
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negativeTest =this.lambdaFormula(min, Biot)*this.lambdaFormula(max, Biot) |
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if (negativeTest <=0 ) { |
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var antiFreeze=0; |
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while (Math.abs(result) > errorTolerance && antiFreeze<=500) { //The greater the antiFreeze, the more wasted cycles around a singularity |
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lambdaN = (min+max)/2 |
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result=this.lambdaFormula(lambdaN, Biot) |
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if (Math.abs(result) <= errorTolerance && result<=errorTolerance) { |
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return (lambdaN); //At Root |
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} |
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else if ((this.lambdaFormula(min, Biot)*this.lambdaFormula(lambdaN, Biot))>=0) { |
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min=lambdaN; |
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} |
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else if ((this.lambdaFormula(max, Biot)*this.lambdaFormula(lambdaN, Biot))>=0) { |
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max=lambdaN; |
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} |
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antiFreeze++ |
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} |
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} |
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}, |
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lambdaFormula: function( lambdaN, Biot ) { |
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var result = 1-lambdaN*(1/Math.tan(lambdaN))-Biot; |
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return(result) |
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}, |
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transientSphereSeries: function( density, thermalConduct, heatConvection, cp, rPosition, rTotal, tempInitial, tempInfini, t ){ |
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var min = 0; |
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var max = 10000; // This are for setting Lambda boundaries and nothing else |
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var sum=0; |
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var alpha = thermalConduct/(density*cp); |
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var lambdaN; |
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var sinPortion; |
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var exponentialPortion; |
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var frontCoefficientPortion; |
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//console.log("Alpha is " + alpha) |
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var Fourier = (alpha*t)/Math.pow(rTotal,2) |
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//console.log("Fourier is " + Fourier) |
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var biotNum = heatConvection * rTotal/thermalConduct |
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if ( biotNum != this.cachedBiot ) { |
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console.log("Recalculating Lambda Terms") |
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this.cachedLambda = this.findAllRoots(min,max,max*Math.PI*10,biotNum) |
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this.cachedBiot = biotNum; |
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} |
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//console.log("The Biot Value is " + biotNum) |
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for (var i = 0; i<this.cachedLambda.length; i++) { |
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var lambdaN = this.cachedLambda[i]; |
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var sinPortion= Math.sin(lambdaN*rPosition/rTotal)/(lambdaN*rPosition/rTotal); |
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var exponentialPortion = (1/Math.exp(Math.pow(lambdaN,2)*Fourier)); |
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var frontCoefficientPortion = 4*(Math.sin(lambdaN)-(lambdaN*Math.cos(lambdaN)))/ (2*lambdaN-Math.sin(2*lambdaN)); |
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sum = frontCoefficientPortion*exponentialPortion*sinPortion + sum; |
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} |
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tempAtTimeAndRadius=(sum*(tempInitial-tempInfini))+tempInfini |
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console.log("The Temperature at radius " + rPosition + " m and time " + t/60/60 + " hours is " + tempAtTimeAndRadius + " C or " + this.C2F(tempAtTimeAndRadius) + " F"); |
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return(tempAtTimeAndRadius) |
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}, |
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/* Utility Functions */ |
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C2F: function( celsius ){ |
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return ( (celsius*(9/5)) + 32 ); |
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}, |
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F2C: function( farenheit ) { |
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return ( (farenheit-32) *(5/9) ); |
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}, |
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lbs2kgs: function(pounds){ |
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return pounds * 0.453592 |
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}, |
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randRange: function(min, max){ |
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return Math.floor(Math.random()*(max-min+1))+min; |
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}, |
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cookCondition: function(cookValue,volume){ |
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var multiplier = 1; |
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if (cookValue>=multiplier*600000) { |
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return ["House Fire", (cookValue-600000)/(multiplier*600000)]; |
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} |
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else if(cookValue>=multiplier*250000) { |
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return ["Charcoal", (cookValue-250000)/(multiplier*600000)]; |
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} |
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else if (cookValue>=multiplier*150000) { |
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return ["Dry", (cookValue-150000)/(multiplier*250000)]; |
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} |
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else if (cookValue>=multiplier*12000) { |
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return ["Cooked", (cookValue-12000)/(multiplier*150000)]; |
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} |
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else if (cookValue>=multiplier*5000) { |
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return ["Undercooked", (cookValue-5000)/(multiplier*12000)]; |
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} |
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else { |
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return ["Raw", 1]; |
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} |
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} |
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} |
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//Running the Program Stuff |
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/* |
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var ovenObject = new OvenModel(); |
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var turkey = new TurkeyModel(9.07185, ovenObject ); |
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globalTime=0; |
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setInterval(function(){ovenObject.secondTick();},10); |
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*/
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