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Intern: Worawat Meevasana
Mentor and Faculty Supervisor: Professor Guenter Ahlers
Department: Physics |
THE RING PATTERNS IN THE CONVECTION OF ISOPROPONAL
The purpose of this experiment is to study the ring patterns in the convection
of isoproponal. We are interested in the pattern because we wish to experimentally
verify a recently proposed theory describing pattern behavior above onset. In
this experiment, we attempted to obtain ring patterns in the circular cell by
using a sidewall heater. We applied a constant power to the sidewall heater
while increasing the temperature difference between the top and bottom plates
to above onset. As a result, the ring pattern occured below onset; however,
the ring pattern started to disappear close to onset while the square and roll
patterns started occurring. We fail to obtain the ring pattern above onset.
The failure may be caused by the impurity of the isoproponal which is indicated
by the occurrence of the square pattern.
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