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Excavation process - time dependent
Posted Mar 20, 2013, 10:42 a.m. EDT 3 Replies
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Hi,
I am trying to model a real-time excavation of a borehole. Assuming that at the time t = 0, the drilling begins and at time t = 1 day, the tunnel advancement is 1 m (drilling velocity = 1m/day). Imagine that I build a cylindrical mesh inside a cubbic mesh. The outer surface of the cylinder is where the drilling is initiated. The drilling advancement is along the cylinder. What the boundary conditions I should use in the outer surface of the cylinder to simulate the drilling process? Thanks.
I am trying to model a real-time excavation of a borehole. Assuming that at the time t = 0, the drilling begins and at time t = 1 day, the tunnel advancement is 1 m (drilling velocity = 1m/day). Imagine that I build a cylindrical mesh inside a cubbic mesh. The outer surface of the cylinder is where the drilling is initiated. The drilling advancement is along the cylinder. What the boundary conditions I should use in the outer surface of the cylinder to simulate the drilling process? Thanks.
3 Replies Last Post Mar 21, 2013, 2:38 a.m. EDT
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Posted:
1 decade ago
Hi,
do you know this model from the COMSOL "showroom"?
www.comsol.com/showroom/documentation/model/9747/
Even if you could not open it in case you do not have a license for the required modules, the documentation files are quite interesting. They explain how to implement a stepwise excavation advance using a parametrized geometry based on parameters from a parametric sweep.
Maybe this model and the according documentation are of interest for your problem?
Best regards,
Juergen
do you know this model from the COMSOL "showroom"?
www.comsol.com/showroom/documentation/model/9747/
Even if you could not open it in case you do not have a license for the required modules, the documentation files are quite interesting. They explain how to implement a stepwise excavation advance using a parametrized geometry based on parameters from a parametric sweep.
Maybe this model and the according documentation are of interest for your problem?
Best regards,
Juergen
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Posted:
1 decade ago
I have looked through the example you gave me. The example is steady case but I want to expand to transient case. Other than that, the example is quite complex so I want to simplify it. Anyway, thanks for your suggestion.
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Posted:
1 decade ago
Hi,
parametrized geometry also works in transient studies.
You can combine a parametric sweep and a transient solver.
I did some similar models quite a while ago.
The tricky thing in my case was to use the solution of the last parametric sweep step as initial values for the next parametric sweep step.
Best regards,
Juergen
parametrized geometry also works in transient studies.
You can combine a parametric sweep and a transient solver.
I did some similar models quite a while ago.
The tricky thing in my case was to use the solution of the last parametric sweep step as initial values for the next parametric sweep step.
Best regards,
Juergen