- Sections
- A. General Materials & Mathematics
- B. Statics
- C. Kinematics & Dynamics
- D. Rotational Mechanics
- E. Gravitation & Astronomy
- F. Fluid Mechanics
- G. Vibrations & Mechanical Waves
- H. Sound
- I. Thermodynamics
- J. Electrostatics & Magnetostatics
- K. Electromagnetic Principles
- L. Geometrical Optics
- M. Wave Optics
- N. Spectra & Color
- O. Vision
- P. Modern Physics
I2-26. Leidenfrost Phenomenon
Purpose
To demonstrate the Leidenfrost effect.
Equipment
Aluminum sheet on hot plate with squeeze jar of green water.
Images
Description
Turn on the hot plate to high for about two minutes to pre-heat the aluminum sheet/skillet. Then squirt a few large drops of water (with green food coloring to make it visible) onto the aluminum skillet. The water forms drops which skitter around on the hot plate for an unexpectedly long duration, because of an insulating layer of water vapor (steam). Big drops can be created which will persist for a minute or longer, while executing interesting oscillations. This is known as the Leidenfrost phenomenon.
References
Owen F. Gaede, A Thought-Provoking Demonstratio in Heat, TPT 15, 487-488, (1977). Jearl Walker, Drops of Water Dance on a Hot Skillet and The Experimenter Walks on Hot Coals, The Amateur Scientist, ?,126-131, (?). G. Guido Lavalle, P. Carrica, V. Garea, and M. Jaime, A boiling heat transfer paradox, AJP 60, 593-597 (1992).
-
See pagesi1. thermal properties of matter
-
See pagesi2. transfer of heat
-
See pagesi3. gases
-
See pagesi4. changes of state
-
See pagesi5. laws of thermodynamics
-
-
-
See pagesi1. thermal properties of matter
-
See pagesi2. transfer of heat
-
See pagesi3. gases
-
See pagesi4. changes of state
-
See pagesi5. laws of thermodynamics
-
-