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Add note about superancillaries env var

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See #2571
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Ian Bell
2025-07-04 19:15:46 -04:00
parent 559a8cbaf3
commit 19109a4ca2
1 changed files with 2 additions and 1 deletions
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Web/coolprop/SuperAncillary.ipynb
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@@ -39,7 +39,8 @@
"\n",
"### Caveats:\n",
"* When superancillaries are enabled, the \"critical point\" is the numerical one that is obtained by enforcing $\\left(\\frac{\\partial p}{\\partial \\rho}\\right)_T = \\left(\\frac{\\partial^2 p}{\\partial \\rho^2}\\right)_T = 0$, rather than the one reported by the EOS developers. This is because the superancillaries are developed to try to fix the critical region as well as possible. The differences can be sometimes not too small: [An Analysis of the Critical Region of Multiparameter Equations of State](https://scholar.google.com/citations?view_op=view_citation&hl=en&user=WNn0e_4AAAAJ&sortby=pubdate&citation_for_view=WNn0e_4AAAAJ:1qzjygNMrQYC)\n",
"* When pressure is provided, the inverse superancillary for $T(p)$ is used, which introduces a very small error"
"* When pressure is provided, the inverse superancillary for $T(p)$ is used, which introduces a very small error\n",
"* When superancillaries are used, there is an overhead per `AbstractState` instantiation on the order of 100 $\\mu$s; if you cannot tolerate that overhead, either a) use the low-level interface, where that overhead can be amortized, or define the environment variable `COOLPROP_DISABLE_SUPERANCILLARIES_ENTIRELY` to turn off the parsing of superancillary data structures."
]
},
{