Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm making a tea bag experiment (Make a hollow cylindrical tube from light paper e.g. from an empty tea bag. When the top end of the cylinder is lit, it takes off.) I need to know how hot air is moving so please help me if you have thermal imaging camera or with out it write your opinion

share|cite|improve this question

closed as not constructive by Waffle's Crazy Peanut, Manishearth Dec 23 '12 at 18:14

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

I know the main idea but I would like to know the character of air movement . Thank you in advance. – baletiano Dec 23 '12 at 12:00
The character of the air movement is turbulent. It has a Reynolds number, which can give you a rough characterization of the behavior, based on the width of the tube, the density of the air (a function of it's temperature and pressure) and the viscosity (also a function of temperature and pressure). The concise answer is: It's complicated. Real complicated. – KDN Dec 23 '12 at 12:54
Removed the -1 by adding a +1. Can you please stop the ridiculous drive by negative voting??? – Antillar Maximus Dec 23 '12 at 15:31
how can I calculate pressure? – baletiano Dec 23 '12 at 16:17