Hello all,
I'm working on a hydrometer test for our small company, but we just started doing these so I'm spending some time reading into the theory and analyzing our results. Technically ASTM D422 has been withdrawn; I've read some studies showing that the estimated particle sizes from the...
I'm trying to generate a system curve from EPANet. I found a reply by Fel3 explaining how to do this here: https://www.eng-tips.com/viewthread.cfm?qid=420577
The problem is that my "Discharge" node has a base demand of -1 and I'm getting a "system ill-conditioned at node Discharge" I think...
I'm working on the design of a rectangular concrete sedimentation basin (settling pond). We're doing a preliminary calculation to see if the cost is feasible for the client to run a full design/construction. This is fairly new to me so I've been doing some research. Essentially, we have a...
Sorry CVG, it is actually an 8" pipe, and this is for fire flow so the v is pretty high.
LittleInch, I think that was exactly the problem. I was using feet of water instead of air. Confirmed this with manufacturer as well. Losses in this case are 76ft of air = 0.04psi. So we're good.
Well, I need to justify it if I'm going to ignore it. As far as I can tell, the losses are pretty significant. First off, air is technically compressible, but at velocities slower than Mach 0.3, I don't think we need to consider that. Technically it could be travelling at Mach 0.37 through...
We're considering allowing a 2" tapping saddle for a 3" diameter air release line into a new pipe (contractor 'forgot' to install tee). Assuming air flow works similar to water, the losses due to the sudden 3" to 2" reduction are negligible at the flow rates we're looking at. The flow of air...
