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diff --git a/Transport_Phenomena:_A_Unified_Approach/ch9.ipynb b/Transport_Phenomena:_A_Unified_Approach/ch9.ipynb new file mode 100755 index 00000000..9c828c2d --- /dev/null +++ b/Transport_Phenomena:_A_Unified_Approach/ch9.ipynb @@ -0,0 +1,204 @@ +{ + "metadata": { + "name": "" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 9 : Agitation" + ] + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 9.3 - Page No :389\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "import math\n", + "\n", + "# Variables\n", + "Nblades = 4.; \t\t\t # no. of blades\n", + "d = 9/12.; \t\t\t #[ft] - diameter of the impeller\n", + "dt = 30/12.; \t\t\t #[ft] - diameter of the math.tank\n", + "Nbaffles = 4. \t\t\t # no. of baffles\n", + "h = 30.; \t \t\t # [inch] - height of unit\n", + "mu = 10.; \t\t\t #[cP] - vismath.cosity of fluid_\n", + "sg = 1.1; \t\t \t # specific gravity of fluid_\n", + "s = 300. \t\t\t #[rpm] - speed of agitator\n", + "CbyT = 0.3; \n", + "\n", + "# Calculations\n", + "V = (math.pi*dt**3)/4; \t #volume of math.tank in ft**3\n", + "V1 = V*7.48; \t\t\t #[gal] - volume of math.tank in gallons\n", + "mu = mu*(6.72*10**-4); #[lb/ft*sec]\n", + "p = sg*62.4; \t\t\t #[lb/ft**3] - density of fluid_\n", + "N = s/60.; \t\t\t #[rps] - impeller speed in revolutions per second\n", + "Nre = ((d**2)*N*p)/mu;\n", + "\n", + "# Results\n", + "print \"Nre = %.2e\"%Nre\n", + "print \" Therefore the agitator operates in the turbulent region\"\n", + "Npo = 1.62;\n", + "gc = 32.174;\n", + "P = (Npo*(p*(N**3)*(d**5)))/(gc*550);\n", + "Cf = 63025.;\n", + "Tq = (P/s)*Cf;\n", + "PbyV = P/V;\n", + "PbyV1 = P/V1;\n", + "TqbyV = Tq/V;\n", + "TqbyV1 = Tq/V1;\n", + "print \" The power per unit volume and the torque per unit volume is \\nP/V = %.2ef hp/ft**3 = %.2e \\\n", + "hp/gal \\nTq/V = %.2f in*lb/ft**3 = %.3f in*lb/gal\"%(PbyV,PbyV1,TqbyV,TqbyV1);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Nre = 2.87e+04\n", + " Therefore the agitator operates in the turbulent region\n", + " The power per unit volume and the torque per unit volume is \n", + "P/V = 1.52e-02f hp/ft**3 = 2.03e-03 hp/gal \n", + "Tq/V = 3.19 in*lb/ft**3 = 0.427 in*lb/gal\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 9.4 - Page No :391\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "# Variables\n", + "Tpilot = 30.;\n", + "Tlab = 10.;\n", + "N1 = 690.;\n", + "N2 = 271.;\n", + "D2 = 3.;\n", + "D1 = 1.;\n", + "\n", + "# Calculations\n", + "n = (math.log(N1/N2))/(math.log(D2/D1));\n", + "V = 12000/7.48; \t\t\t #[ft**3]\n", + "T = ((4.*V)/math.pi)**(1./3); \t\t\t #[ft]\n", + "R = 12.69/(30/12.);\n", + "N3 = N2*(1./R)**n; \t\t\t #[rpm] - impeller speed in the reactor\n", + "\n", + "# Results\n", + "print \"impeller speed in rpm = %f\"%round(N3,4)\n", + "D3 = 0.75*R; \t\t\t #[ft] - reactor impeller diameter\n", + "print \"reactor impeller diameter in ft = %.3f\"%D3\n", + "P = 0.1374*((N3/N2)**3)*(R**5);\n", + "print \"power in hp = %.3f\"%P\n", + "Cf = 63025.;\n", + "Tq = (P/N3)*Cf; \t\t\t #[inch*lb]\n", + "print \"torque in inch*lb = %.0f\"%Tq\n", + "print \"At this point, the design is complete. \\nA sarc ard size impeller would be chosen as \\\n", + " well as a tan ard size motor7.5 hp or 10 hp\"\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "impeller speed in rpm = 68.044500\n", + "reactor impeller diameter in ft = 3.807\n", + "power in hp = 7.329\n", + "torque in inch*lb = 6789\n", + "At this point, the design is complete. \n", + "A sarc ard size impeller would be chosen as well as a tan ard size motor7.5 hp or 10 hp\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 9.5 - Page No : 393\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "from numpy import *\n", + "\n", + "\n", + "# Variables\n", + "# given\n", + "n = array([0.5, 0.6, 0.7, 0.8, 0.9, 1.0]);\n", + "D2 = 3.806;\n", + "D1 = 0.25;\n", + "R = D2/D1;\n", + "N1 = 690.;\n", + "\n", + "# Calculations\n", + "N2 = N1*((D1/D2)**n);\n", + "P1 = 9.33*10**-3; \t\t\t #[hp]\n", + "P2 = P1*R**(5.-3*n);\n", + "\n", + "# Results\n", + "print \" n N,rpm P,hp\"\n", + "for i in range(6):\n", + " print \" %f %4.0f %4.0f\"%(n[i],N2[i],P2[i]);\n", + "\n", + "\n", + "# Answers may be differ because of rounding error." + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " n N,rpm P,hp\n", + " 0.500000 177 128\n", + " 0.600000 135 57\n", + " 0.700000 103 25\n", + " 0.800000 78 11\n", + " 0.900000 60 5\n", + " 1.000000 45 2\n" + ] + } + ], + "prompt_number": 29 + } + ], + "metadata": {} + } + ] +}
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