From a4d5b3dd778ef2ea314292ae8cdf0a03b98a9b20 Mon Sep 17 00:00:00 2001 From: OLSSON Hans Date: Fri, 5 Jul 2019 14:00:40 +0200 Subject: [PATCH] Allow simplification of inStream even if we find that mass-flow is zero/negative Closes #2242 --- chapters/derivationofstream.tex | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/chapters/derivationofstream.tex b/chapters/derivationofstream.tex index 9859ffb71..d700df5b2 100644 --- a/chapters/derivationofstream.tex +++ b/chapters/derivationofstream.tex @@ -171,8 +171,10 @@ \subsection{Connection of 2 stream connectors, one to one connections (N=2):}\do \subsection{Connection of 3 stream connectors where one mass flow rate is identical to zero (N=3 and $\dot{m}_3=0$):}\doublelabel{connection-of-3-stream-connectors-where-one-mass-flow-rate-is-identical-to-zero-n-3-and} This case occurs, when a one-port sensor (like a temperature sensor) is connected to two connected components. For the sensor, the min attribute -of the mass flow rate has to be set to zero (no fluid exiting the -component via this connector). The suggested implementation results in +of the mass flow rate should be set to zero (no fluid exiting the +component via this connector). +This simplification can also be used if a tool determines that a mass flow rate is zero or non-negative. +The suggested implementation results in the following equations, and as indicated the last formula can be simplified further by using $\dot{m}_3=0$: \begin{eqnarray*}