- #1
PatrickAndrews
- 11
- 0
My question relates to entropy generation in a closed system
ΔS=dQrev/T for a reversible process
ΔS=dQ/T + Sgen for an irreversible process
This seems to suggest that Sgen arises because of the irreversibility of the heat transfer process (eg across a finite temperature difference).
If, however, we have reversible heat transfer to a system, but also some form of internal friction occurring (eg turbulence), can we say something like
ΔS=dQrev/T + Sgen(turbulence)
Also, if we have irreversible heat transfer and also frictional irreversibilities, does something like this apply?
ΔS=dQ/T + Sgen(finite temperature heat transfer) + Sgen(turbulence)
Or adiabatically, with internal friction
ΔS=Sgen(turbulence) ??
Thanks in advance. I'm finding its surprisingly hard to get a clear view of this apparently simple issue...
ΔS=dQrev/T for a reversible process
ΔS=dQ/T + Sgen for an irreversible process
This seems to suggest that Sgen arises because of the irreversibility of the heat transfer process (eg across a finite temperature difference).
If, however, we have reversible heat transfer to a system, but also some form of internal friction occurring (eg turbulence), can we say something like
ΔS=dQrev/T + Sgen(turbulence)
Also, if we have irreversible heat transfer and also frictional irreversibilities, does something like this apply?
ΔS=dQ/T + Sgen(finite temperature heat transfer) + Sgen(turbulence)
Or adiabatically, with internal friction
ΔS=Sgen(turbulence) ??
Thanks in advance. I'm finding its surprisingly hard to get a clear view of this apparently simple issue...
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