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diff --git a/Fluidization_Engineering/ch5.ipynb b/Fluidization_Engineering/ch5.ipynb new file mode 100644 index 00000000..4fb61904 --- /dev/null +++ b/Fluidization_Engineering/ch5.ipynb @@ -0,0 +1,138 @@ +{ + "metadata": { + "name": "ch5" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter 5 : Bubbles in Dense Beds" + ] + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 1, Page 126\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Charactersitics of a Single Bubble\n", + "\n", + "#Variable declaration\n", + "dt=60.0; #ID of tube in cm \n", + "dp=300; #Size of particles of bed in micrometers\n", + "umf=3; #Velocity at minimum fluidization condition in cm/s\n", + "ephsilonmf=0.5; #Void fraction of bed at minimum fluidization condition\n", + "db=5; #Diameter of bubble in cm\n", + "g=980; #Acceleration due to gravity in cm/s**2\n", + "\n", + "#CALCULATION\n", + "#Computation of rise velocity of bubble\n", + "if (db/dt)<0.125:\n", + " ubr=(0.711*((g*db)**0.5));#Rise velocity by Eqn.(3)\n", + "elif (db/dt)<0.6:\n", + " ubr=(0.711*((g*db)**0.5))*1.2*exp(-1.49*(db/dt));#Rise velocity by Eqn.(4) \n", + "\n", + "#Computation of cloud thickness\n", + "Rb=db/2.0; #Radius of bubble\n", + "uf=umf/ephsilonmf; #Velocity of emulsion gas\n", + "Rc=Rb*((ubr+(2*uf))/(ubr-uf))**(1/3.0);#Radius of cloud by Eqn.(6)\n", + "\n", + "#OUTPUT\n", + "print 'The rise velocity of the bubble=%.1f cm/s'%ubr\n", + "print 'The cloud thickness=%.2f cm'%(Rc-Rb)\n", + "print 'From Fig.8(page 124)comparing fw vs dp, for dp = %.0f micrometer, wake fraction = 0.24'%dp\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The rise velocity of the bubble=49.8 cm/s\n", + "The cloud thickness=0.30 cm\n", + "From Fig.8(page 124)comparing fw vs dp, for dp = 300 micrometer, wake fraction = 0.24\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 3, + "metadata": {}, + "source": [ + "Example 2, Page 132\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Initial Bubble Size at a Distributor\n", + "\n", + "import math\n", + "\n", + "#Variable declaration\n", + "uo=15; #Superificial gas velocity in cm/s\n", + "umf=1; #Velocity at minimum fluidization condition in cm/s\n", + "lor=2.0; #Pitch of perforated plate in cm\n", + "g=980; #Acceleration due to gravity in cm/s**2\n", + "#CALCULATION\n", + "#Case(a) For porous plate\n", + "dbo1=(2.78/g)*(uo-umf)**2;#Initial bubble size using Eqn.(19)\n", + "\n", + "#Case(b) For Perforated plate\n", + "Nor=(2/math.sqrt(3))*(1/lor)**2;#Number of orifices in cm**-2\n", + "dbo2=(1.30/(g**0.2))*((uo-umf)/Nor)**0.4;#Initial bubble size using Eqn.(15) assuming inital bubble size is smaller than hole spacing\n", + "\n", + "#OUTPUT\n", + "print 'Case(a) For porous plate'\n", + "print '\\tInitial bubble size=%.2fcm'%dbo1\n", + "print 'Case(b) For Perforated plate'\n", + "print '\\tInitial bubble size=%.2fcm'%dbo2\n", + "print '\\tSince %f<%f, the equation used is correct.'%(dbo2,lor)" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Case(a) For porous plate\n", + "\tInitial bubble size=0.56cm\n", + "Case(b) For Perforated plate\n", + "\tInitial bubble size=1.55cm\n", + "\tSince 1.548765<2.000000, the equation used is correct.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
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