1D Manholes: Difference between revisions
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The model was run with a steady inflow of 2m<sup>3</sup>s<sup>-1</sup>.
The resulting losses from the 1 hour steady inflow simulation are presented in the following graph. Note that the following worked examples are based on output at Time=0.5 hours.
===Example 1 - Entry Losses===
Entry losses are applied as an exit loss on the incoming conduit and are calculated as follows.
[[File:K entry.PNG]]
<br>
Where:
[[File:Vp.PNG]]
<br>
With other parameters defined in the section above.
The calculated flow area in the manhole is 3.6m<sup>2</sup> and 1m<sup>2</sup> in the adjacent culvert whilst the flow is 2m<sup>3</sup>/s for both Q<sup>p</sup> and Q<sup>om</sup>. Therefore, V<sup>m</sup> equals:
[[File:Vm1.PNG]]
<br>
And V<sup>p</sup>:<br>
[[File:VP1.PNG]]
<br>
Using these in the K<sub>entry</sub> equation provides a loss coefficient of:
<br>
[[File:K entry1.PNG]]
The value matches the downstream loss coefficient for the upstream conduit. The loss values are also shown in the *_tsl.shp file with the third value for the upstream conduit providing the entrance loss value.
=Storage chambers=
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