I'm using Geopak Drainage on MicroStation SS4. I noticed that the values reported for "Total Loss at Upstream of Link" do not appear to be using the loss equations listed in the Help Documents for Geopak. Is this a known issue?
I've calculated the Terminal Loss manually [(K*V^2)/2g] using every velocity I can generate from Geopak Drainage (Actual Upstream, Actual Downstream, Iterative, Critical, Full, Uniform) and NONE of them match the loss value generated by Geopak. My preferences are set to use the actual velocity for loss calculations. The "Defined Equations" use K=1.0 for terminal inlets, so it should just boil down to V^2/64.4, but as you can see from the screenshots this is not the loss that is being calculated (I get the same results when supplying a K of 1.0). Any ideas? Or is this an unresolved issue with Geopak?
Example: The "Actual Upstream" velocity in the screenshot, V = 2.681. Loss = (K*V^2)/2g = (1*2.681^2) / 64.4 = 0.112. The Loss in the Link Configuration Computations window = 0.161.
Just bumping the thread. Anyone have any insight?
Still looking for input. Someone please help..
Still no response.. At this point i'm guessing that nobody knows?
I just have concerns that if a client asks how the loss is calculated, nobody seems to know the answer.
I suggest you log a Support Request with Bentley. Then you will definitely get a response.
Karl Dauber, PEAdvance ConsultingLaurens County, SCkarldauber@advconsult.netwww.advconsult.netwww.linkedin.com/in/karldauber
Unfortunately I do not believe Bentley still offers support for this product since they integrated Geopak with ORD.