Jumping Leidenfrost droplets
(2012) FYSM60 20121Department of Physics
Solid State Physics
- Abstract
- A leidenfrost droplet forms when a liquid droplet is placed on a very hot
surface. In the case that there is a thin layer of insulating material as a step on the substrate, under specific conditions Leidenfrost droplets interact with the edge of the step. The result of this interaction is sometimes lateral detachment or jumping from the surface. Specically, the best jumping can be observed when liquid nitrogen droplets move on a brass substrate with a piece of plastic tape as a step. This thesis experimentally studies the specific physics of the jumping process.
We examined the effect of the step material, liquid property and the
step height on the jumping process. We hypothesize that the Marangoni
effect, due to thermal gradients... (More) - A leidenfrost droplet forms when a liquid droplet is placed on a very hot
surface. In the case that there is a thin layer of insulating material as a step on the substrate, under specific conditions Leidenfrost droplets interact with the edge of the step. The result of this interaction is sometimes lateral detachment or jumping from the surface. Specically, the best jumping can be observed when liquid nitrogen droplets move on a brass substrate with a piece of plastic tape as a step. This thesis experimentally studies the specific physics of the jumping process.
We examined the effect of the step material, liquid property and the
step height on the jumping process. We hypothesize that the Marangoni
effect, due to thermal gradients contributes to this type of motion. This is evident by comparing the estimated Marangoni flow and measurement flow
rate. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/3167726
- author
- Baktash, Mehri LU
- supervisor
-
- Heiner Linke LU
- organization
- course
- FYSM60 20121
- year
- 2012
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Marangoni effect, Heat transfer, Leidnfrost the effect, Liquid solid interaction, Surface tension
- language
- English
- id
- 3167726
- date added to LUP
- 2012-11-20 17:27:20
- date last changed
- 2012-11-21 15:58:43
@misc{3167726, abstract = {{A leidenfrost droplet forms when a liquid droplet is placed on a very hot surface. In the case that there is a thin layer of insulating material as a step on the substrate, under specific conditions Leidenfrost droplets interact with the edge of the step. The result of this interaction is sometimes lateral detachment or jumping from the surface. Specically, the best jumping can be observed when liquid nitrogen droplets move on a brass substrate with a piece of plastic tape as a step. This thesis experimentally studies the specific physics of the jumping process. We examined the effect of the step material, liquid property and the step height on the jumping process. We hypothesize that the Marangoni effect, due to thermal gradients contributes to this type of motion. This is evident by comparing the estimated Marangoni flow and measurement flow rate.}}, author = {{Baktash, Mehri}}, language = {{eng}}, note = {{Student Paper}}, title = {{Jumping Leidenfrost droplets}}, year = {{2012}}, }