Changes between Version 2 and Version 3 of u/JCMar2212

Timestamp:

03/21/12 15:39:59 (13 years ago)

Author:

Jonathan

Comment:

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u/JCMar2212

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 == The results ==
 
 [[Image(JCMar4.png)]]
 
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 ----
 
 [[Image(JCMar5.png)]]
 
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 ----
 
 [[Image(JCMar6.png)]]
 
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+== Conclusions ==
+ * SFR can be modeled by turbulent processes creating over densities
+ * Overdense gas is continually replenished on time scales < [[latex($\tau_{ff,cr}$)]]
+ * Critical density has the same dependence on [[latex($\alpha_{vir}$)]] and [[latex($\mathcal{M}_0$)]] as in Krumholz and !McKee, but the dependency on the SFR is different.  This is because Krumholz and !McKee assume that overdense gas is replenished on a time scale [[latex($\phi_t \tau_{ff,0}$)]] and not [[latex($\tau_{ff,cr}$)]].  The results of the simulations agree well with [[latex($\tau_{ff,cr}$)]] and not with [[latex($\phi_t \tau_{ff,0}$)]] since [[latex($\tau_{ff,cr} \propto \rho_{cr}^{-1/2} \propto \alpha_{vir}^{-1/2} \mathcal{M}_0^{-1}$)]].  Higher energy flows create thinner shocks which have to reach higher densities before collapsing - but once they do, they collapse more quickly.
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+== Questions ==
+ * Does driving turbulence before turning on gravity, give turbulence a head start in dominating structures on all scales?  
+ * Does their choice of periodic boundaries prevent gravity's strongest mode
+ * Is it fair to assume that every cell that is denser then the critical density is surrounded by enough mass to collapse?