Community > Discussion Forum > semi infinte

Discussion Forum

semi infinte

Topics: 4.0a

Thread index  |  Previous thread  |  Next thread  |  Start a new discussion

RSS FeedRSS feed   |   Email notificationsTurn on email notifications   |   3 Replies   Last post: February 8, 2012 1:07pm UTC
Yomna Shaker

Yomna Shaker

February 7, 2012 5:38am UTC

semi infinte

Dear Ivar

I have infinte cable (3 m) and i want to study a sector (0.165 m) to get the temperture distribution

how can i define the boundary at the infinte end?

i.e how can i tell comsol that this end of cable is too long and infinte


thank you very much

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse

0 votes
Edgar Kaiser

Edgar Kaiser

February 7, 2012 9:49am UTC in response to Yomna Shaker

Re: semi infinte

Hi,

I am not Ivar, but this is a forum and not meant for directly adressing specific people. You also enhance your chance of getting response by talking to the forum.

Regarding your question: This appears to be a typical case for a 2D study. This will automatically treat the cable like it was infinitely long and allow you to investigate the cross section.

Cheers
Edgar

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse

0 votes
Yomna Shaker

Yomna Shaker

February 7, 2012 6:14pm UTC in response to Edgar Kaiser

Re: semi infinte

Dear Sir

I am so sorry but i didn't meant to ask specific person ( but Ivar has replied my questions since 4 months)

regarding my question

i didn't describe my problem correctly

i have infiniite cable and i don't want to get cross section, i want to study a specific length from the whole length

how can i define the infint length at the boundries?

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse

0 votes
Edgar Kaiser

Edgar Kaiser

February 8, 2012 1:07pm UTC in response to Yomna Shaker

Re: semi infinte


I don't know if there is a good solution to this. You might check whether 'infinite elements' can address the issue. I never used that so far.

But I want insist a bit on the 2D approach. If the following prerequisites are fulfilled:

- The cable is infinitely long, i.e. much longer than the 0.165 m you are interested in
- The structure of the cable is constant along its length
- The environment outside is constant along the cable

Then you will find constant values along the cable and you can simplify everything to 2D, no?

Cheers
Edgar

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse


Rules and guidelines