{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "## Chapter 3: Fluid Kinematics" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.1 Page no 117" ] }, { "cell_type": "code", "execution_count": 2, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "(a) u = 4*X; v = -4*Y \n", "(b) u= 4.0 m/s and v= -8.0 m/s\n", "(c) Magnitude of velocity = 8.94 m/s and angle of resultant velocity = -63.4 deg\n" ] } ], "source": [ "# Dimension of flow field ; velocity components at (1,2) ; magnitude and direction of velocity \n", "\n", "from math import *\n", "\n", "# Given\n", "\n", "# V = 4*Xi-4Yj\n", "\n", "x=1 # x co-ordinate\n", "\n", "y=2 # y co-ordinate\n", "\n", "# Solution\n", "\n", "print \"(a) u = 4*X; v = -4*Y \"\n", "\n", "u = 4*x\n", "\n", "v=- 4*y\n", "\n", "print \"(b) u=\",round(u,0),\"m/s and v=\",round(v,0),\"m/s\"\n", "\n", "R =sqrt(u**2+v**2)\n", "\n", "ang = atan(v/u)*180/pi\n", "\n", "print \"(c) Magnitude of velocity =\",round(R,2),\"m/s and angle of resultant velocity = \",round(ang,1),\"deg\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.2 Page no 119" ] }, { "cell_type": "code", "execution_count": 3, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "(a) Discharge = 1.06 m**3/s\n", "(b) Mass flow rate = 1057.21 kg/s\n" ] } ], "source": [ "# Discharge and mass flow rate\n", "\n", "from math import *\n", "\n", "from __future__ import division\n", "\n", "# Given\n", "\n", "d = 0.3 # diameter of pipe in m\n", "\n", "v = 15 # velocity in m/s\n", "\n", "rho = 997.1 # density in kg/m**3\n", "\n", "A = pi*d**2/4\n", "\n", "# Solution\n", "\n", "Q=A*v\n", "\n", "print \"(a) Discharge =\",round(Q,2),\"m**3/s\"\n", "\n", "mdot = rho*Q\n", "\n", "print \"(b) Mass flow rate = \",round(mdot,2),\"kg/s\"\n" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.3 Page no 120 " ] }, { "cell_type": "code", "execution_count": 4, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "Mean velocity of the flow = 5.0 m/s\n" ] } ], "source": [ "# Mean Velocity\n", "\n", "from math import *\n", "\n", "from __future__ import division\n", "\n", "from scipy import integrate\n", "\n", "# Given\n", "\n", "Vo = 10 # velocity in m/s\n", "\n", "r1 = 0\n", "\n", "ro = 0.1 # radius in m\n", "\n", "N = 1\n", "\n", "# Solution\n", "\n", "R = lambda r: (10*r-1000*r**3)\n", "\n", "R1,err=integrate.quad(R,r1,ro)\n", "\n", "Q = R1*2*pi\n", "\n", "A = pi*(0.1)**2\n", "\n", "V = Q/A\n", "\n", "print \"Mean velocity of the flow =\",round(V,0),\"m/s\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.4 Page no 126" ] }, { "cell_type": "code", "execution_count": 1, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "2*x - 2*y**2\n" ] }, { "data": { 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CxobA2sxadCSNxMQAEyYADx7QdAwRi0bwn7vz54HGjfmtk9evA4MGCS/ur1Nf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\n/+/+/+HI7SO4NvGa6Cj54uU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"text/plain": [ "" ] }, "metadata": {}, "output_type": "display_data" } ], "source": [ "# Sketch the stream lines in the first quadrant\n", "\n", "import matplotlib.pyplot as plt\n", "\n", "from math import *\n", "\n", "from scipy import integrate\n", "\n", "import numpy as np\n", "\n", "from sympy import *\n", "\n", "#init_printing(use_unicode=False, warp_line=False, no_global=True)\n", "\n", "# Given\n", "\n", "# V = 4*y(m)i+2(m)j\n", "\n", "x = Symbol('x')\n", "U = integrate(2,x)\n", "\n", "#print u\n", "\n", "y = Symbol('y')\n", "\n", "V = integrate(-4*y,y)\n", "\n", "#print V\n", "\n", "Zhi = U + V\n", "\n", "print Zhi # for x and y =0 we get C = 0\n", "\n", "X = [5,6,7,8,9,10,11,12,13,14,15,16,17]\n", "Y = [0,1.414,2,2.449,2.828,3.16,3.46,3.741,4,4.242,4.472,4.69,4.898]\n", "\n", "b1=plt.plot(X,Y)\n", "\n", "\n", "X1 = [2.5,3,4,5,6,7,8,9,10,11,12,13,14,15]\n", "Y1 = [0,1,1.732,2.23,2.645,3,3.31,3.60,3.87,4.123,4.35889,4.5825,4.795,5]\n", "\n", "b2=plt.plot(X1,Y1)\n", "\n", "\n", "X2 = [0.5,1.5,2.5,3.5,4.5,5.5,6.5,7.5,8.5,9.5,10.5,11.5,12.5,13.5,14.5,15.5]\n", "Y2 = [0,1.414,2,2.449,2.828,3.162,3.462,3.741,4,4.242,4.472,4.69,4.898,5.099,5.29,5.4772]\n", "\n", "b3=plt.plot(X2,Y2)\n", "\n", "plt.xlabel(\"x\")\n", "\n", "plt.ylabel(\"y\")\n", "\n", "plt.title(\"Streamline plot\")\n", "\n", "plt.legend([\"zhi=10\",\"zhi=5\",\"zhi=1\"])\n", "plt.show()" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.5 PAge no 127" ] }, { "cell_type": "code", "execution_count": 8, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "Resutant velocity magnitude = 17.89 m/s\n", "Angle = 63.4 deg with the X-axis in the 4th quadrant\n" ] } ], "source": [ "# magnitude and direction of flow field\n", "\n", "from math import *\n", "\n", "from sympy import *\n", "\n", "import numpy as np\n", "\n", "# Given\n", "\n", "x = 2 # X co-ordinate\n", "\n", "Y = 4 # Y co-ordiante\n", "\n", "# Solution\n", "y = Symbol('y')\n", "\n", "zhi = 4*x*y\n", "\n", "zhiprime = zhi.diff(y)\n", "\n", "u = zhiprime\n", "\n", "x = Symbol('x')\n", "\n", "zhi = 4*x*Y\n", "\n", "zhiprime = zhi.diff(x)\n", "\n", "v = zhiprime\n", "\n", "R=sqrt(u**2+v**2)\n", "\n", "theta = atan(v/u)*180/pi\n", "\n", "print \"Resutant velocity magnitude = \",round(R,2),\"m/s\"\n", "\n", "print \"Angle =\",round(theta,1),\"deg with the X-axis in the 4th quadrant\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.6 Page no 130" ] }, { "cell_type": "code", "execution_count": 9, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "(a) Velocity = 5.1 m/s\n", "(b) Convective acceleration = 0.46 m**2/s\n" ] } ], "source": [ "# Determine velocity ; convective accleration\n", "\n", "from math import *\n", "\n", "from __future__ import division\n", "\n", "from sympy import *\n", "\n", "import numpy as np\n", "\n", "from scipy import integrate\n", "\n", "# Given\n", "\n", "d1 = 0.09 # diameter in cm\n", "\n", "d2 = 0.025 # diameter in cm\n", "\n", "rho = 1000 # density in kg/m**3\n", "\n", "mdot = 25 # mass flow rate in kg/s\n", "\n", "# Solution\n", "\n", "x = Symbol('x')\n", "\n", "A1 = pi*d1**2/4\n", "\n", "A2 = pi*d2**2/4\n", "\n", "AA = A1 - ((A1-A2)/40)*10 # from figure\n", "\n", "V = mdot/(rho*AA)\n", "\n", "print \"(a) Velocity =\",round(V,1),\"m/s\"\n", "\n", "AX = (A1 - ((A1-AA)/40)*x)\n", "\n", "v = 25*10**4/(rho*AX)\n", "\n", "vprime = v.diff(x)\n", "\n", "V1 = vprime\n", "\n", "# at x = 0.1 m we get dv/dx = 0..09\n", "\n", "VPrime = 0.09\n", "\n", "Acx = V*VPrime\n", "\n", "print \"(b) Convective acceleration =\",round(Acx,3),\"m**2/s\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.8 Page no 143 " ] }, { "cell_type": "code", "execution_count": 10, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "z = -25.0\n", "Hence the flow is rotational\n" ] } ], "source": [ "# Is the flow irrotational\n", "\n", "from math import *\n", "\n", "# Given\n", "\n", "# w = (16y-12x)i +(12y-9x)j\n", "\n", "# Solution\n", "\n", "y = Symbol('y')\n", "\n", "U = 16*y-12*x\n", "\n", "zhiprime = U.diff(y)\n", "\n", "u = zhiprime\n", "\n", "\n", "x = Symbol('x')\n", "\n", "V = 12*y-9*x\n", "\n", "zhiprime1 = V.diff(x)\n", "\n", "v = zhiprime1\n", "\n", "#Vx = -9 # differentiate V wrt x\n", "\n", "#Vx = -9 # differentiate V wrt x\n", "#Uy = 16 # differentiate U wrt y\n", "\n", "z = v-u\n", "\n", "print \"z = \",round(z,0)\n", "\n", "print \"Hence the flow is rotational\"" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Example 3.10 Page no 148" ] }, { "cell_type": "code", "execution_count": 11, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "Velocity at the larger cross section = 3.33 m/s\n" ] } ], "source": [ "# Velocity in larger section\n", "\n", "from math import *\n", "\n", "# Given\n", "\n", "d1 = 0.1 # diameter in m\n", "\n", "d2 = 0.3 # diameter in m\n", "\n", "V1 = 30 # velocity in m/s\n", "\n", "# Solution\n", "\n", "V2 = (d1**2/d2**2)*V1\n", "\n", "print \"Velocity at the larger cross section = \",round(V2,2),\"m/s\"" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [] } ], "metadata": { "kernelspec": { "display_name": "Python 2", "language": "python", "name": "python2" }, "language_info": { "codemirror_mode": { "name": "ipython", "version": 2 }, "file_extension": ".py", "mimetype": "text/x-python", "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython2", "version": "2.7.3" } }, "nbformat": 4, "nbformat_minor": 0 }