Hello , I recently surveyed my college pipe network and wanted to make it in water cad and analyse it. I got all the surface elevations , contours etcMY DOUBT is when we connect a pipe to a tank to another tank. When there is a vertical downward/upward bend in pipe how to represent it in water cad.
I tried a lot but bend is happening only horizontally. Please help me with it.
Hello ADR,
Pipe lengths are assumed to be horizontal. So, a vertical pipe can be modeled by choosing "true" for "has user defined length", then entering the vertical length. Enter the elevations of the adjacent nodes based on the elevation difference. Profiles will show this pipe's length as horizontal, but the hydraulic results should be accurate. Let me know if you have any question.
So you know, the answer to this question is available in Bentley's online KnowledgeBase, which can be found at the following link: appsnet.bentley.com/.../Default.aspx
Please search for the kb entry 60960. You can also find other numberous frequently asked question in our knowledgebase. Thank you.
Regards,
Shahzaib Bukhari
Honestly I did not go check out the knowledge center and I am sure it is covered but what about at situation where you are modeling a high rise and you wanted to know each floor or top and bottom?
ADR,
Could you elaborate more on the overall goal of this model? In some cases, the user would approximate the building as just one junction with a demand, based on the average usage of that building.
Are you trying to model two tanks at the top of the building? Are they both located in the vicinity of J-7? If so, you could just replace J-7 with one tank. The junction is not needed unless you need to report the pressure there. You could enter a small user defined length in P-10 with a large diameter, but I'm not sure you need to include all this detail; you may need to take a step back and keep it simple.
If the headloss from the vertical pipe is not significant to your analysis, you could even replace J-6 and omit the vertical pipe. It depends on what you actually need this model for - do you need to analyze the detail of the operation of these tanks?
Also, you should avoid placing two tanks hydraulically close together, as this will cause oscillations. See the "modeling hydraulically close tanks" modeling tip in the Help documentation for more on that.
If you are new to WaterCAD, I would recommend following the Quick Start lessons in the help and considering our formal training offering. As a general hydraulic modeling reference, I would also recommend our Advanced Water Distribution Modeling and Management book. These things will help you be more efficient at modeling in WaterCAD.
www.bentley.com/.../AWDM.htm
Hope it helps,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Thank you sir.
The actual case. The building already has two tanks above where i have shown you. Obviously those tanks are connected by a pipe running on the ground. The pipe actually runs through the slabs of the building and finally at the base of the tanks a T junction is provided and split in to two so that it is connected to both the tanks. I need to calculate the pressure in the pipe, losses. Just as we do by Hardy Cross Method manually. Please tell me how to design to this scenario. If not water CAD are they any other programes which can do so?
Sounds like you have used/performed Hardy Cross Method earlier. If that's the case then to simplify or to help you step by step, please show us the representative network diagram of what you are trying to accomplish then we can help you further how to model that network in WaterCAD. Based on what you have described here, WaterCAD can give you the hydraulic results you are looking for.
Rather than all the building details and verbal illustration of connections, let us see your network drawing and then we will give further directions to achieve the hydraulic results.
It's doable but we need to have a clear picture of what your are doing so that we can help you effectively.
Thank you Akshaya. The network model is very difficult to show you. It's very complex. Instead I'll send you the site where i'm working in a picture.I need to connect the UG (underground tank) tank to the tank above the building. I have marked them in black circles. So at the bottom of the building can we provide a vertical pipe?
The basic thing is can we design a vertical Pipe ? :)
If you are really after modeling a vertical pipe then Yes we can model a vertical pipe.
Let's say you have:
o1-------------o2-----------o3-------------o4
o1 elevation = 0fto2 elevation = 10fto3 elevation = 20fto4 elevation = 30ft
o1 to o2 pipe length =10fto2 to o3 pipe length =10fto3 to o4 pipe length =10ft
Please note, hydraulic result will not change no matter how to draw a pipe or node. Your result will remain the same if put all nodes (o1, o2, o3, o4) just on top of each other or you draw them in square or in circle or draw however you like. The hydraulic result will remain the same.
If you agree with what I said then Yes you can very easily model a vertical pipe. Now it's up to you how you want to draw your pipes in the drawing.
With the information like above, if you run the model, you will get the result as if the pipes are vertical in the real world.
HTH
Thank you for the instructions.
I have a small doubt. See in real world at the bottom of the building a bend upwards is provided 90degrees. here as you old if o2 has elevation 10 ft and o3 has elevation 20 ft. I think the pipe would not bend excatly 90 degrees but in rising gradient type from 20 ft to 30 ft. My main problem is that. :( Please give me an incentive to this issue
ADR,If you build your model like below and run it. And then you put all the nodes into one location and run it, your result will be the same.
Regarding your 'T' section, could you please draw and illustrate your problem?
ADR - I think I understand what you are getting at. As a solution could you put a pipe at that elbow, assign it an equivalent length for the 90 and set it at the elevation of where that 90 is located at. Then put a label on it indicating that the is the 90. That way you will get the effects of the 90.
this is actually a t section in a vertical pipe. Here it clearly explains my problem. the pipe coming from UG tank exactly is split like this at the tee one pipe upwards connects one tank and another pipe gng horizontally connects another pipe some distance after. So how can we do this in water cad. If not in water cad any other softwares are available ?
Thanks for the picture that helps.
Let's make it little complex and let's assume you have a Cross (of 5 connections) rather than Tee then you can model that just like the highlighted (red) junction in the picture below. The vertical pipe next to it is going directly from lower level (or ground floor) to higher level (or top floor).
Note: Treat every fitting (T, Y, L, X etc) as a junction then I think you will find your way.