# Annotation of /trunk/doc/examples/cookbook/example01c.py

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Fri Sep 21 02:47:54 2012 UTC (7 years ago) by jfenwick
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```First pass of updating copyright notices
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 1 gross 2904 2 jfenwick 3981 ############################################################################## 3 gross 2904 # 4 jfenwick 3911 # Copyright (c) 2009-2012 by University of Queensland 5 jfenwick 3981 6 gross 2904 # 7 # Primary Business: Queensland, Australia 8 # Licensed under the Open Software License version 3.0 9 10 # 11 jfenwick 3981 # Development until 2012 by Earth Systems Science Computational Center (ESSCC) 12 # Development since 2012 by School of Earth Sciences 13 # 14 ############################################################################## 15 gross 2904 16 jfenwick 3911 __copyright__="""Copyright (c) 2009-2012 by University of Queensland 17 jfenwick 3981 http://www.uq.edu.au 18 gross 2904 Primary Business: Queensland, Australia""" 19 __license__="""Licensed under the Open Software License version 3.0 20 21 __url__= 22 23 """ 24 Author: Antony Hallam antony.hallam@uqconnect.edu.au 25 """ 26 27 ahallam 2977 ############################################################FILE HEADER 28 # example01c.py 29 # Model temperature diffusion between two granite blocks of unequal 30 # initial temperature. Solve for the spatial distribution of temperature. 31 32 gross 2904 # To solve the problem it is necessary to import the modules we require. 33 from esys.escript import * # This imports everything from the escript library 34 from esys.escript.unitsSI import * 35 from esys.escript.linearPDEs import LinearPDE # This defines LinearPDE as LinearPDE 36 jfenwick 3259 from esys.finley import Rectangle # This imports the rectangle domain function 37 gross 2904 #For interactive use, you can comment out the next two lines 38 import matplotlib 39 matplotlib.use('agg') #It's just here for automated testing 40 import pylab as pl #Plotting package. 41 import numpy as np #Array package. 42 import os, sys #This package is necessary to handle saving our data. 43 44 ahallam 2977 ########################################################MPI WORLD CHECK 45 gross 2904 if getMPISizeWorld() > 1: 46 import sys 47 jfenwick 3892 print("This example will not run in an MPI world.") 48 gross 2904 sys.exit(0) 49 50 ahallam 2977 #################################################ESTABLISHING VARIABLES 51 gross 2904 #Domain related. 52 mx = 500*m #meters - model length 53 my = 100*m #meters - model width 54 ndx = 100 # mesh steps in x direction 55 ndy = 1 # mesh steps in y direction - one dimension means one element 56 boundloc = mx/2 # location of boundary between the two blocks 57 #PDE related 58 ahallam 3374 rho = 2750. *kg/m**3 #kg/m{3} density of iron 59 cp = 790.*J/(kg*K) # J/Kg.K thermal capacity 60 rhocp = rho*cp 61 kappa = 2.2*W/m/K # watts/m.Kthermal conductivity 62 qH=0 * J/(sec*m**3) # J/(sec.m{3}) no heat source 63 gross 2904 T1=20 * Celsius # initial temperature at Block 1 64 ahallam 3374 T2=2273. * Celsius # base temperature at Block 2 65 gross 2904 66 ahallam 2977 ################################################ESTABLISHING PARAMETERS 67 gross 2904 t=0 * day # our start time, usually zero 68 tend=50 * yr # - time to end simulation 69 outputs = 200 # number of time steps required. 70 h=(tend-t)/outputs #size of time step 71 #user warning statement 72 jfenwick 3892 print("Expected Number of time outputs is: ", (tend-t)/h) 73 gross 2904 i=0 #loop counter 74 #the folder to put our outputs in, leave blank "" for script path 75 gross 2949 save_path= os.path.join("data","example01") 76 gross 2904 #ensure the dir exists 77 mkDir(save_path, os.path.join(save_path,"tempT")) 78 79 ahallam 2977 ####################################################DOMAIN CONSTRUCTION 80 gross 2904 blocks = Rectangle(l0=mx,l1=my,n0=ndx, n1=ndy) 81 ahallam 2977 82 ###############################################ESCRIPT PDE CONSTRUCTION 83 gross 2904 #... open PDE and set coefficients ... 84 mypde=LinearPDE(blocks) 85 mypde.setSymmetryOn() 86 A=zeros((2,2)) 87 A[0,0]=kappa 88 mypde.setValue(A=A,D=rhocp/h) 89 # ... set initial temperature .... 90 x=Solution(blocks).getX() 91 T= T1*whereNegative(x[0]-boundloc)+T2*(1-whereNegative(x[0]-boundloc)) 92 93 # ... open a collector for the time marks and corresponding total energy 94 t_list=[] 95 E_list=[] 96 # ... convert solution points for plotting 97 plx = x.toListOfTuples() 98 plx = np.array(plx) #convert to tuple to numpy array 99 plx = plx[:,0] #extract x locations 100 ahallam 2977 ########################################################START ITERATION 101 gross 2904 while t

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