Changeset 438

Timestamp:

05/15/09 08:22:55 (16 years ago)

Author:

Mathieu Morlighem

Message:

updated SquareIceshelf example

Location:

issm/trunk/examples/SquareIceShelf

Files:

• Front.exp (modified) (1 diff)
• README (modified) (1 diff)
• Shelf.exp (deleted)
• Square.par (modified) (1 diff)

issm/trunk/examples/SquareIceShelf/Front.exp

@@ -1 @@
-## Name:
+## Name:icefront
 ## Icon:0
-# Points Count  Value
-5       1.
-# X pos Y pos
--1000 990000
-1001000  990000
-1001000  1001000
--1000  1001000
--1000 990000
+# Points Count  Value
+5 1.
+# X pos Y pos
+-1000 900000
+-1000 1100000
+1100000 1100000
+1100000 900000
+-1000 900000

issm/trunk/examples/SquareIceShelf/README

@@ -1 +1 @@
 md=model;
 md=mesh(md,'DomainOutline.exp',50000);
-md=geography(md,'Shelf.exp','');
+md=geography(md,'all','');
 md=parameterize(md,'Square.par');
-md.acceleration=1;
+md=setelementstype(md,'macayeal','all');
 md=solve(md,'diagnostic','ice');

issm/trunk/examples/SquareIceShelf/Square.par

@@ +1 @@
+%Start defining model parameters here
 
-%Ok, start defining model parameters here
+%dynamics
+md.dt=1*md.yts; %1 year
+md.ndt=md.dt*10; 
+md.artificial_diffusivity=1;
 
-%material parameters
-        md.g=9.8;
-        md.rho_ice=917;
-        md.rho_water=1023;
-        di=md.rho_ice/md.rho_water;
-        md.yts=365*24*3600;
-        md.heatcapacity=2009;
-        md.thermalconductivity=2.2; %W/mK
-        md.beta=9.8*10^-8;
+disp('      creating thickness');
+hmin=300;
+hmax=1000;
+ymin=min(md.y);
+ymax=max(md.y);
+md.thickness=hmax+(hmin-hmax)*(md.y-ymin)/(ymax-ymin);
+md.bed=-md.rho_ice/md.rho_water*md.thickness;
+md.surface=md.bed+md.thickness;
 
-%Solution parameters
-        %parallelization 
-        md.cluster='no';
-        md.cluster_name='cosmos';
-        md.np=2;
-        md.time=1;
-        md.exclusive=0;
+disp('      creating drag');
+md.drag_type=2; %0 none 1 plastic 2 viscous
+md.drag=200*ones(md.numberofgrids,1); %q=1.
+%Take care of iceshelves: no basal drag
+pos=find(md.elementoniceshelf);
+md.drag(md.elements(pos,:))=0;
+md.p=ones(md.numberofelements,1);
+md.q=ones(md.numberofelements,1);
+md.viscosity_overshoot=0.3;
 
-        %statics
-        md.lowmem=1;
-        md.eps_rel=0.01;
-        md.eps_abs=10;
-        md.penalty_offset=3;
-        md.penalty_melting=10^7;
-        if md.numberofgrids<1000000,
-        md.sparsity=.001;
-        else
-        md.sparsity=.0001;
-        end
+disp('      creating temperature');
+md.observed_temperature=(273-20)*ones(md.numberofgrids,1);
 
-        %dynamics
-        md.dt=1*md.yts; %1 year
-        md.ndt=md.dt*10; 
-        md.artificial_diffusivity=1;
+disp('      creating flow law paramter');
+md.B=paterson(md.observed_temperature);
+md.n=3*ones(md.numberofelements,1);
 
-        %control
-        md.control_type={'drag'}; %'drag', 'B'
-        md.nsteps=5;
-        md.tolx=10^-4;
-        md.maxiter=20;
-        md.optscal=10;
-        md.fit='logarithmic'; %'absolute','relative','logarithmic'
-        md.meanvel=1000/md.yts; %1000 meters/year
-        md.epsvel=eps;
+%Deal with boundary conditions:
+md=SetIceShelfBC(md,'Front.exp');
 
-
-        disp('      creating thickness');
-        hmin=300;
-        hmax=1000;
-        ymin=min(md.y);
-        ymax=max(md.y);
-        md.thickness=hmax+(hmin-hmax)*(md.y-ymin)/(ymax-ymin);
-        md.firn_layer=10*ones(md.numberofgrids,1);
-        md.bed=-di*md.thickness;
-        md.surface=md.bed+md.thickness;
-
-        disp('      creating velocities');
-        md.vx_obs=zeros(md.numberofgrids,1);
-        md.vy_obs=zeros(md.numberofgrids,1);
-        md.vel_obs=sqrt(md.vx_obs.^2+md.vy_obs.^2);
-        
-        disp('      creating drag');
-        md.drag_type=2; %0 none 1 plastic 2 viscous
-        md.drag=200*ones(md.numberofgrids,1); %q=1.
-        %Take care of iceshelves: no basal drag
-        pos=find(md.elementoniceshelf);
-        md.drag(md.elements(pos,:))=0;
-        md.p=ones(md.numberofelements,1);
-        md.q=ones(md.numberofelements,1);
-
-        disp('      creating temperature');
-        md.observed_temperature=(273-20)*ones(md.numberofgrids,1);
-
-        disp('      creating flow law paramter');
-        md.B=paterson(md.observed_temperature);
-        md.n=3*ones(md.numberofelements,1);
-
-        disp('      creating accumulation rates');
-        md.accumulation=ones(md.numberofgrids,1)/md.yts; %1m/a
-        md.melting=0*ones(md.numberofgrids,1)/md.yts; %1m/a
-
-        %Deal with boundary conditions:
-        
-        disp('      boundary conditions for diagnostic model: ');
-        %Build gridonicefront, array of boundary grids belonging to the icefront:
-        gridinsideicefront=ArgusContourToMesh(md.elements,md.x,md.y,expread('Front.exp',1),'node',2);
-        gridonicefront=double(md.gridonboundary & gridinsideicefront);
-
-        md.gridondirichlet_diag=zeros(md.numberofgrids,1);
-        pos=find(md.gridonboundary & ~gridonicefront);md.gridondirichlet_diag(pos)=1;
-        md.dirichletvalues_diag=zeros(md.numberofgrids,2);
-
-        pos=find(gridonicefront(md.segments(:,1)) | gridonicefront(md.segments(:,2)));
-        md.segmentonneumann_diag=md.segments(pos,:);
-        md.neumannvalues_diag=NaN*ones(length(md.segmentonneumann_diag),1); %dynamic boundary conditions (water pressure)
-
-        disp('      boundary conditions for prognostic model: ');
-        md.gridondirichlet_prog=zeros(md.numberofgrids,1);
-        md.dirichletvalues_prog=zeros(md.numberofgrids,1);
-        pos=find(gridonicefront(md.segments(:,1)) | gridonicefront(md.segments(:,2)));
-        md.segmentonneumann_prog=md.segments(pos,:);
-        md.neumannvalues_prog=zeros(size(md.segmentonneumann_prog,1),1);
-        md.neumannvalues_prog(:)=NaN; %free radiation
-        
-        pos=find(gridonicefront(md.segments(:,1)) | gridonicefront(md.segments(:,2)));
-        md.segmentonneumann_prog2=md.segments(pos,:);
-        md.neumannvalues_prog2=zeros(size(md.segmentonneumann_prog2,1),1);
-        md.neumannvalues_prog2(:)=NaN; %free radiation
-        
-        disp('      boundary conditions for thermal model: ');
-        md.gridondirichlet_thermal=ones(md.numberofgrids,1); %surface temperature
-        md.dirichletvalues_thermal=md.observed_temperature;
-        md.geothermalflux=zeros(md.numberofgrids,1); 
-        pos=find(md.elementonicesheet);md.geothermalflux(md.elements(pos,:))=50*10^-3; %50 mW/m^2
-
-
-        
-
-% Some Cielo code, ignore.
-if strcmp(md.cluster,'yes')
-        ServerDisconnect;
-end   
+%Parallel options
+md.np=3;
+md.time=50;
+md.waitonlock=1;