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######################################################## |
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# |
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# Copyright (c) 2003-2009 by University of Queensland |
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# Earth Systems Science Computational Center (ESSCC) |
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# http://www.uq.edu.au/esscc |
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# |
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# Primary Business: Queensland, Australia |
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# Licensed under the Open Software License version 3.0 |
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# http://www.opensource.org/licenses/osl-3.0.php |
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# |
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######################################################## |
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__copyright__="""Copyright (c) 2003-2009 by University of Queensland |
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Earth Systems Science Computational Center (ESSCC) |
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http://www.uq.edu.au/esscc |
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Primary Business: Queensland, Australia""" |
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__license__="""Licensed under the Open Software License version 3.0 |
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http://www.opensource.org/licenses/osl-3.0.php""" |
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__url__="https://launchpad.net/escript-finley" |
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|
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""" |
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Author: Antony Hallam antony.hallam@uqconnect.edu.au |
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""" |
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# To solve the problem it is necessary to import the modules we require. |
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from esys.escript import * # This imports everything from the escript library |
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from esys.escript.linearPDEs import LinearPDE # This defines LinearPDE as LinearPDE |
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from esys.finley import Rectangle # This imports the rectangle domain function from finley |
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import os #This package is necessary to handle saving our data. |
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from cblib import needdirs |
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##ESTABLISHING VARIABLES |
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#PDE related |
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mx = 500 # model lenght |
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my = 100 # model width |
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ndx = 500 # steps in x direction |
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ndy = 1 # steps in y direction |
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q=0 #our heat source temperature is now zero |
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Tref=2273 # Kelvin #the starting temperature of our intrusion |
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rho = 2750 #kg/m^{3} density |
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cp = 790 #j/kg specific heat |
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rhocp = rho*cp #DENSITY * SPECIFIC HEAT |
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eta=0. # RADIATION CONDITION |
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kappa=2.2 # Watts/(meter*Kelvin) DIFFUSION CONSTANT, HEAT PERMEABILITY |
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#Script/Iteration Related |
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t=0. #our start time, usually zero |
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tday=10*365. #the time we want to end the simulation in days |
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tend=tday*24*60*60 |
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outputs = 400 # number of time steps required. |
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h=(tend-t)/outputs #size of time step |
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print "Expected Number of Output Files is: ", outputs |
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print "Step size is: ", h/(24.*60*60), "days" |
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i=0 #loop counter |
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save_path = "data/onedheatdiff_var001" #the folder to put our outputs in, leave blank "" for script path - note this folder path must exist to work |
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needdirs([save_path]) |
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#... generate domain ... |
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model = Rectangle(l0=mx,l1=my,n0=ndx, n1=ndy) |
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# extract finite points |
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x=model.getX() |
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#... open PDE ... |
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mypde=LinearPDE(model) |
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mypde.setSymmetryOn() |
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mypde.setValue(A=kappa*kronecker(model),D=rhocp/h,d=eta,y=eta*Tref) |
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# ... set initial temperature .... |
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bound = x[0]-mx/(ndx/250.) |
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T= 0*Tref*whereNegative(bound)+Tref*wherePositive(bound) |
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saveVTK(os.path.join(save_path,"data%03d.vtu") %i,sol=T) |
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# ... start iteration: |
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while t<=tend: |
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i+=1 |
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t+=h |
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mypde.setValue(Y=rhocp/h*T) |
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T=mypde.getSolution() |
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saveVTK(os.path.join(save_path,"data%03d.vtu") %i,sol=T) |
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# iteration var 2 |
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#Tl = 0 |
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#Tr = Tref |
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#while Tl < Tr*0.8: |
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#mypde.setValue(Y=rhocp/h*T) |
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#T=mypde.getSolution() |
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#i+=1 |
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#x=rod.getX() |
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#Tl= x[0] |
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#Tr= x[ |
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#print "Finish temp balance in:", i*h/(24.*60*60), " days" |
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