| 5.4 – WUDS and UDS implementation | ||
On both schemes,  should have the same sign of the mass flow rate in the conservation equations. Therefore, considering that the sign is contained in Pe, it will “enter” in of the WUDS, and we should compensate the loss of the minus sign, because Pe is squared in that equation.Noticing that, as mentioned previously,  has always the same sign of  , we can write (4.11) as follows: |
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(5.4.1a) |
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(5.4.1b) |
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(5.4.1c) |
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(5.4.1d) |
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By the considerations above should always be given as a positive quantity, including the cases that we are handling UDS. |
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