What is a entrainment in thunderstorms?
Entrainment, the process by which turbulent clouds introduce dry air from outside the cloud inward via overturning eddies at the cloud edge, can decrease the cloud buoyancy, and the water and/or ice mass it contains, limiting both cloud and precipitation development.
What is water entrainment?
Entrainment is the transport of fluid across an interface between two bodies of fluid by a shear-induced turbulent flux. Entrainment is important in turbulent jets, plumes, and gravity currents and is a topic of current research.
How does dissipation happen?
The three primary ways that clouds dissipate is by (1) the temperature increasing, (2) the cloud mixing with drier air, or (3) the air sinking within the cloud. When the temperature increases, the air has a higher capacity to evaporate liquid water.
What happens when clouds disappear?
Without clouds, average surface temperatures would rise by as much as 22 degrees Celsius. This extreme temperature spike would not only destroy the habitats of most flora and fauna, killing off whatever survived the drought, it would also melt the polar ice caps and cause massive flooding of coastal cities.
What is the meaning of entrainment?
1 : to draw along with or after oneself. 2 : to draw in and transport (something, such as solid particles or gas) by the flow of a fluid. 3 : to incorporate (air bubbles) into concrete. 4 : to determine or modify the phase or period of circadian rhythms entrained by a light cycle.
What are downdrafts?
Downdraft – A small-scale column of air that rapidly sinks toward the ground, usually accompanied by precipitation as in a shower or thunderstorm. A downburst is the result of a strong downdraft.
What is entrainment in chemistry?
Chemistry. the carrying along of a substance in a moving fluid, as drops of liquid in a vapor during evaporation or distillation:The research studies the physical processes determining droplet entrainment in turbulent gas flow over a liquid layer in pipes and channels.
What is dissipation in science?
Dissipation is a term that is often used to describe ways in which energy is wasted. Any energy that is not transferred to useful energy stores is said to be wasted because it is lost to the surroundings. In a mechanical system, energy is dissipated when two surfaces rub together.
What is dissipation of heat?
Heat dissipation is a type of heat transfer. Heat dissipation occurs when an object that is hotter than other objects is placed in an environment where the heat of the hotter object is transferred to the colder objects and the surrounding environment.
What is entrainment science?
Technically, entrainment in physics refers to the frequency locking of two oscillating bodies, i.e., bodies that can move in stable periodic or rhythmic cycles. They have different frequencies or movement periods when moving independently, but when interacting they assume a common period.
What do you mean by entrainment in meteorology?
Entrainment is the mixing of environmental air into a preexisting air current or cloud so that the environmental air becomes part of the current or cloud.
When does entrainment occur in a turbulent flow?
Entrainment (meteorology) Entrainment is a phenomenon of the atmosphere which occurs when a turbulent flow captures a non-turbulent flow.
When does entrainment occur in a tropical cyclone?
Entrainment is a phenomenon of the atmosphere which occurs when a turbulent flow captures a non-turbulent flow. It is typically used to refer to the capture of a wind flow of high moisture content, or in the case of tropical cyclones, the capture of drier air. Detrainment is the opposite effect when…
Which is the opposite of the effect of entrainment?
Detrainment is the opposite effect, when the air from a convective cloud, usually at its top, is injected in the environment. Entrainment is the mixing of environmental air into a preexisting air current or cloud so that the environmental air becomes part of the current or cloud.