Throttling Temperature effect

Synonym: Throttling Temperature effect = Joule–Thomson effect

Fluid temperature change (warming or cooling) under the throttling process.

The value of temperature effect $\begin{array}{l}\delta T\end{array}$ is proportional to pressure drop $\begin{array}{l}\delta P\end{array}$ :

(1)	$\begin{array}{l}\displaystyle \delta T = \epsilon_{JT} \cdot \delta P\end{array}$

where

$\begin{array}{l}\epsilon_{JT}\end{array}$

In Fluid Dynamics the Joule–Thomson effect (1) translates to the following equation:

(2)	$\begin{array}{l}\displaystyle \frac{\partial T}{\partial t} = \epsilon_{JT} \cdot {\bf u} \cdot \nabla P\end{array}$

where

$\begin{array}{l}t\end{array}$	time
$\begin{array}{l}\bf u\end{array}$	flow velocity
$\begin{array}{l}\nabla\end{array}$	vector differential operator

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