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Visual Hydraulics 4.2 Features

New Hydraulic Elements

 

Visual Hydraulics 4.2 offers three new hydraulic elements for analysis as part of the upgraded software package.  These elements are the combining/dividing tee, open channel contraction/expansion, and the rectangular notched weir.  New hydraulic elements are added as feedback is received from users regarding the types of elements typically encountered and their desire for inclusion of those elements within the software.  As we receive those requests, we determine the viability of adding them to the software and the value that they will provide.  Innovative Hydraulics has determined that these elements are readily encountered and make the software more powerful.  The following descriptions and diagrams give a brief summary of these newly added elements.

Combining/Dividing Tee:

 

    

The combining/dividing tee presents a very unique challenge theory wise.  No set equations have been developed for the hydraulic analysis of these tees, only graphs based on extensive testing done by D.S. Miller (published in Internal Flow Systems, D.S. Miller).  Innovative Hydraulics has taken the time to analyze these graphs and develop K value tables based on the data presented in the graphs, and those K value tables have been included as part of Version 4.2.  Based on the information provided by the user (diameters of the tee, approximate flow split, and angle of the tee), the software determines a K value, which in turn is used to determine the appropriate head loss.

Open Channel Contraction/Expansion:

 

It is not uncommon to encounter a channel that changes width, and this change in width is typically done as a transition rather than abruptly.  Transitions may be either channel contractions or expansions.  Based on the information provided by the user (type of transition, respective widths of the channel, channel invert, and flow), the software will determine a K value for the transition's characteristics.  This K value is then multiplied by the velocity in the channel to determine the relative head loss of the transition.

Rectangular Notched Weir:

 

The rectangular notched weir is very similar in operation to the v-notch weir, with the rectangular notches provided more flow capacity than the v-notch.  Typical installations of the rectangular notch occur as clarifier or other process tank effluent weirs.  Single larger rectangular notch weirs may be used in some scenarios.  For analysis by Visual Hydraulics 4.2, the user provides the invert of the weir notches, size of the notches, number of notches, and flow over the weir.

 

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