BSA Flow Software Installation and User's Guide - CSI

Set-up of the remote PC
5.8 Coincidence
In the address field above, type only the first part of the name, without the
domain name.
To activate the traverse server, run the VtravServer.exe program located in
the BSA Flow Software folder. This will show the traverse server icon in
the lower left corner of the screen.
Right-click on the icon – select Settings and check the Use TCP/IP Network
box:
Click OK.
The traverse system is now ready for remote operation.
Due to different sensitivity of the various receivers, a seeding particle
passing through the outskirts of the measuring volume may sometimes
generate a velocity sample on one channel, without simultaneously
generating a sample on the other(s).
Most calculations involving two or more velocity components require that
the velocity samples in question are coincident (i.e. simultaneous). Consider
coordinate transformation as an example: Calculating an orthogonal velocity
sample with components u, v and w from “skew” components u1, u2 and u3
obviously require that the latter are simultaneous. Otherwise the calculated
(orthogonal) velocity sample would have no meaning, since it could not be
related to any specific point in time. Similar considerations apply when
calculating cross-moments (Reynolds stresses).
Note the 62N BSA can be set up to provide coincident data by placing velocity
channels in the same group. This is hereafter referred to as hardware
coincidence.
If velocity channels are placed in separate groups, software coincidence
can be applied by adding a Coincidence object as described in this section.
Coincidence filtering is a child of a data source object. Possible parent
objects are BSA F/P Application and Import velocity files as shown in
Figure 5-40.
5-48 BSA Flow Software: Project explorer objects