PDE-Toolbox: Time dependent applied Temperature

Hello,

for the simulation of a brake disk, I want to apply the temperature for 7.2 seconds. Then there should only be convection, emissivity and Thermal Conductivity. How do I tell the toolbox to stop heating the disk after 7.2 seconds?

We've tried to put dT into a for-loop but the toolbox just takes the last known value.

Below there is a extract from our current program

%Variables
mm=200; %mass of the motorbike in kg
v0ms=250000/9; %velocity at the start in mm/s
c=460e6; %specific heat capacity
mb=0.43; %mass of the brake disk

thermalmodel = createpde('thermal','transient'); 
importGeometry(thermalmodel,'Model.stl');
generateMesh(thermalmodel);
thermalIC(thermalmodel,20);


%Equations
Ekin=0.5*mm*(v0ms^2); %kinetic energy of the bike
dT=Ekin/(c*mb); %Temperature change

tlist=0:1:20;
thermalBC(thermalmodel,'Face',95,'Temperature',dT); %Temperature, that should be applied for 7.2 seconds


%thermal losses
thermalmodel.StefanBoltzmannConstant=5.670373E-8;
thermalBC(thermalmodel,'Face',1:94,'ConvectionCoefficient',0.05,'AmbientTemperature',20);
thermalBC(thermalmodel,'Face',1:94,'Emissivity',0.4,'AmbientTemperature',20);%Konvektionskoeffizient
thermalBC(thermalmodel,'Face',96:100,'ConvectionCoefficient',0.05,'AmbientTemperature',20);
thermalBC(thermalmodel,'Face',96:100,'Emissivity',0.4,'AmbientTemperature',20);%Konvektionskoeffizient
thermalProperties(thermalmodel,'ThermalConductivity',lam,'MassDensity',rho,'SpecificHeat',c);


 R  = solve(thermalmodel,tlist);

Answer 1

[Kavya Vuriti]

The temperature boundary condition can be specified as a function handle to specify temperature that depends on time and it can be passed to the function thermalBC.

dT= @(location,state) {code to set dT according to time} 
thermalBC(thermalmodel,'Face',95,'Temperature',dT) 

Where state is structure array and state.time field contains time at evaluation points.

For more information, refer the following link:

https://www.mathworks.com/help/pde/ug/pde.thermalmodel.thermalbc.html#bvhtzlo-Temperature