Ablation may refer to the removal of the surface layers of a meteorite during its passage through the atmosphere.
|Ablation of Mercury capsule model.
- Ablation may also mean removal of surface material such as occurs in a combustion
chamber, or the controlled degradation of the leading surfaces of
a spacecraft during atmospheric reentry or passage through a dusty medium in space, such as the tail of a comet.
An expendable surface made of ablative material may be used as a coating
in a combustion chamber, or on the heat shield of a reentry vehicle.
As the ablative material absorbs heat it changes chemical or physical
state and sheds mass, thereby carrying the heat away from the rest of
See also reentry thermal
PHYSICS AND TERMINOLOGY
- In glaciology, ablation is the loss of snow and ice from the surface of a glacier by melting, evaporation, or sublimation;
also, the quantity so lost.
AND PLANETARY SCIENCE
- In medicine, ablation refers to the removal of dead or diseased tissue by excision (cutting away with
a sharp instrument), cryosurgery (freezing), radiotherapy, diathermy
(burning), or laser treatment. Ablation of the thyroid
gland is achieved with radioactive iodine isotopes.