Intenal energy increase in wind of star ?

AI Thread Summary
The discussion revolves around whether the total energy of a star increases when it emits wind, forming shock waves and bubbles. Participants explore the definition of total energy, which includes thermal and kinetic components, and consider the mechanical energy produced by the star. It is suggested that the total energy may decrease due to the nature of the equations governing thermal and kinetic energy. However, some results appear to contradict this conclusion, prompting further inquiry into the sources of energy driving the star's surface activity. The conversation highlights the complexity of energy dynamics in stellar environments.
sam_021
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Homework Statement


If a big star gives of wind , forming shock and then a bubble .. And then this bubble is driven by pressure
Also as the bubble expands the surrounding mass gets added to it
Does it make sense for the Total energy to increase ?

Homework Equations


The Attempt at a Solution

 
Last edited:
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sam_021 said:

Homework Statement


If a big star gives of wind , forming shock and then a bubble .. And then this bubble is driven by pressure
Also as the bubble expands the surrounding mass gets added to it
Does it make sense for the Total energy to increase ?

Homework Equations





The Attempt at a Solution


What are your thoughts? How do you define Total Energy? What source of energy is driving the surface activity on a star?
 
berkeman said:
What are your thoughts? How do you define Total Energy? What source of energy is driving the surface activity on a star?
total energy = thermal + Kinetic

Star gives off mechanical energy, then forming shocks which inturn heats up the surrounding, thus driving the shock via pressure

I would say that the total energy decreases ?
Just from simply looking at the equations Thermal=3/2PV and Ek=0.5mv^2

but I have results that contradict that :(
 
anyone ?
 

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