daFonz5
Mechanical
- Mar 1, 2007
- 1
Hey Everyone,
I'm trying to model radiofrequency ablation (RFA) using ANSYS transient analysis. For those of you who do not know about RFA, it is a process used to kill unwanted tissue in the heart and liver. The tissue surrounding a heated probe is killed via thermal conduction and thus forms a lesion surrounding the probe tip.
I have modeled the geometry and meshed it, but I can't seem to get the analysis to run the way I know it should (it's been done by students who graduated before me and my results look nothing like theirs). The probe tip is a thin rectangle in the center of a large meshed square. I want to apply a constant temperature to the sides and bottom of this rectangle, and see the temperature distribution in the surrounding tissue over different time periods. I have so far tried to simply apply the temperature to the lines of the probe tip, but the lesion created doesn't seem to be a product of lenghty heating, rather just a short period of time (my lesion for 200 seconds is EXACTLY the same as that for 1000 seconds). Can anyone help me define the loads? The tutorials I have seen that use the table method or the load step method are not thorough enough, and I can't seem to get it working.
Again, I want to apply a constant temperature to 3 lines of a rectangle embedded in a large square, and see the temperature distributions resulting from thermal conduction over time. I hope someone can help! I need to get this working ASAP, because I have a large paper due at the end of the semester and I won't have anything to write on if I don't get this working! Thanks!
I'm trying to model radiofrequency ablation (RFA) using ANSYS transient analysis. For those of you who do not know about RFA, it is a process used to kill unwanted tissue in the heart and liver. The tissue surrounding a heated probe is killed via thermal conduction and thus forms a lesion surrounding the probe tip.
I have modeled the geometry and meshed it, but I can't seem to get the analysis to run the way I know it should (it's been done by students who graduated before me and my results look nothing like theirs). The probe tip is a thin rectangle in the center of a large meshed square. I want to apply a constant temperature to the sides and bottom of this rectangle, and see the temperature distribution in the surrounding tissue over different time periods. I have so far tried to simply apply the temperature to the lines of the probe tip, but the lesion created doesn't seem to be a product of lenghty heating, rather just a short period of time (my lesion for 200 seconds is EXACTLY the same as that for 1000 seconds). Can anyone help me define the loads? The tutorials I have seen that use the table method or the load step method are not thorough enough, and I can't seem to get it working.
Again, I want to apply a constant temperature to 3 lines of a rectangle embedded in a large square, and see the temperature distributions resulting from thermal conduction over time. I hope someone can help! I need to get this working ASAP, because I have a large paper due at the end of the semester and I won't have anything to write on if I don't get this working! Thanks!