How Do Physics Principles Explain the Formation of Contrails?

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    Condensation
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SUMMARY

The discussion focuses on the physics principles behind contrail formation, specifically how aircraft exhaust and environmental conditions contribute to this phenomenon. Key factors include the presence of water vapor from jet fuel combustion and the influence of pressure changes caused by aircraft wings. Meteorologists utilize temperature and humidity data to predict the altitude at which contrails form, effectively using these parameters to understand and forecast contrail behavior.

PREREQUISITES
  • Understanding of thermodynamics related to condensation
  • Knowledge of jet fuel combustion products
  • Familiarity with meteorological concepts such as dew point and humidity
  • Basic principles of aerodynamics affecting pressure changes
NEXT STEPS
  • Research the role of water vapor in atmospheric processes
  • Explore the physics of cloud seeding and its applications
  • Learn about meteorological forecasting techniques for contrail prediction
  • Investigate the impact of aircraft design on contrail formation
USEFUL FOR

Aerospace engineers, meteorologists, environmental scientists, and anyone interested in the atmospheric effects of aviation.

thegreatone09
Hey guys! I was wondering how physics is inlvolved in the forming of condensation trails or contrails.
 
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Exhaust from aircraft engines and small particles to the air. If the air is near its dewpoint, with humidity high enough and temperature & air pressure low enough that cloud formation is close to taking place, these contaminants can act like cloud seeding, providing something for moisture to cling to, and triggering cloud formation.
 
There are two types of contrails, Lurch hit on one. One of the main products of combustion of jet fuel is water vapor. So you get condensation.

The other is condensation caused by pressure changes in the wake of an aircraft. The wingtips usually cause this.

Meteorologists use temperature and humidity information to predict contrail formation altitude. Not sure exactly how they do it, but you could google it.
 

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