1D Manholes: Difference between revisions
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[[File:K entry1.PNG]]
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The value matches the downstream loss coefficient for the upstream conduit shown in Figure X. The loss values are also shown in the *
===Example 1 - Exit Losses===
Exit losses are applied to the upstream end of the outgoing conduit and are calculated as follows:
[[File:K exit.PNG]]
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From table 1, we can see that K<sub>m</sub> is set to 1. A<sub>p</sub> and A’<sub>m</sub> are 1m<sup>2</sup> and 3.636m<sup>2</sup> respectively. Therefore, K<sub>exit</sub> is:
[[File:K exit1.PNG]]
Figure X shows that the calculated value matches that provided in the TUFLOW results. The value is also reported as the first value for the downstream conduit in the *_TSL_P.shp layer.
===Example 1 - Outgoing Conduit Losses===
The loss coefficient for the outgoing pipe represents the losses due to the incoming angle of the upstream conduit, any drops in inverts levels between the incoming and outgoing conduits, bend losses and any additional form losses. It is calculated as follows:
[[File:K outletpipe.PNG]]
The default value of K<sub>Bend_max</sub> is set to 4 but can be changed via the 1d_mh K_Bend_Max attribute. As shown above we have no angle for the incoming pipe and no drop in invert levels. Table 1 shows the K_Fixed is equal to 2 and the outgoing pipe has a form loss coefficient, to represent bend losses of 1. Therefore K<sub>outletpipe</sub> is:
[[File:K outletpipe1.PNG]]
This matches the value within Figure x and the middle value for the downstream conduit in the *_TSL_P.shp, representing the outlet conduit losses, of 3.
=Storage chambers=
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