WaterGEMS/WaterCAD Fundamentals Part 3: Workshop 1 (Building a Network with Fire Flows)

[@jacobsidian]

This was a great tutorial, thank you Bentley for this tutorial.

[@NaziruzzamanShyamal]

It is really excellent and easy to understand

[@prasadindi7299]

Good tutorial.. many thanks

[@andresortiz3385]

Hello! First of all thanks for the examples In the first alternative with a demand of 1000 gpm at junction 6 gpm, in my simulation it gives me a result of 9 psi and not -22 why does this happen?

[@bentleyopenflows]

Hi Andres, please double check that the steps were followed correctly, especially with units for things like demand. If you're still having trouble matching results with the answer sheet, please post a copy of your model on our forum: bentleysystems.service-now.com/community?id=kb_article_view&sysparm_article=KB0088588

[@amansahu7260]

How to prepare the scalemodel.dxf ?

[@bentleyopenflows]

Please be more specific and consider posting on our forum: bentleysystems.service-now.com/community?id=community_forum&sys_id=0310b7ca1b1a3110f3fc5287624bcb80

[@utcutnguyen6305]

Thanks

[@nelvamiliko]

Everything is fine except when I try loading my model from "Background layers" 1. The dfx file is not there; 2. With the wtg.dwf file, the following error pops up "Could not load / the background file is invalid or corrupt". Please help, what do I do

[@bentleyopenflows]

Hello Nelva, did you download the dataset from the link in the description of this video? I double checked it and the "scaled network" DXF file is present, in the "Starter" subfolder.

[@nelvamiliko]

@@bentleyopenflows i see but what if I want to create my own hydraulic model? One different from the tutorial? Will The same dataset work in generating dfx files?

[@bentleyopenflows]

​@@nelvamiliko The dataset does not generate a DXF file - it contains a specific DXF file that was made for the workshop. If you would like to create your own hydraulic model, you can use the ModelBuilder tool to import data or lay out the elements manually (both shown in the training), and then place any existing background that you have, such as Bing Maps, an image file, Shapefile or a DXF. For a DXF, you will need to have the DXF file already, to place as a background (which is done from the background layers manager). If you are saying that you would like to export/produce a DXF file that contains all the model elements, this can be done from File > Export > DXF. If this does not help or if you have further technical questions, please post on our forum: communities.bentley.com/products/hydraulics___hydrology/f/haestad-hydraulics-and-hydrology-forum

[@blakej5974]

Hi, the DXF file is not showing up in the downloadable zip file. I checked the started file and do not see the .DXF file

[@blakej5974]

got it

[@Engineering-Ingeneria]

Hello I'm currently carrying out this workshop in WaterCAD CONNECT Edition Update 3. However when i run the fireflow scenario at J-6 i get 15psi instead of -22psi. And no message in my user Notifications. I would like to know what i could be doing wrong.

[@bentleyopenflows]

Hi Christen, check your units and compare to the "solution" model. If this does not help, post a copy of the model (File > Save to Package) on our forum: bentleysystems.service-now.com/community?id=kb_article_view&sysparm_article=KB0088588

[@Engineering-Ingeneria]

The only difference I see is the length scaled in my pipe flex table. could that be causing the different result?

[@bentleyopenflows]

Is the pipe set to use scaled or user defined length? If it is set to use user defined length and the user defined length field is the same, then the length used by the calculations will be the same. If the pipe is set to use scaled length and the scaled length is different, that can impact the pressure because the total headloss across the pipe will be different.

[@chandankumar-jp4li]

What is demand. Should I go to tap of J -6 and tell him that demand is 1000 GPM and flow through the pipe will be come 6.53 feet/sec or when I Tell the J-6 Tap that demand is 500 GPM, flow will automatically change to 3.25 ft/s. What is this miraculous demand??

[@bentleyopenflows]

Demand is an assumed outflow, which the model solves around as a "known". For example you may have historical billing meter information on usage where you can reasonably assume that those are the outflows, and then the model will solve around that (pressure, velocity and other results). For some systems (smaller scale or in developing regions for example), you may not be able to assume a specific outflow for the purposes of the hydraulic simulation if that outflow is particularly sensitive to pressure. In those cases, you can use pressure dependent demands (PDD) where you simulate the characteristics of the opening size and the model calculates the outflow based on the pressure. I would suggest reading some academic and engineering reference material such as Bentley's Advanced Water Distribution Modeling and Management or Computer Applications in Hydraulic Engineering books.

[@ahmadsohrab4724]

Could you please help me to download the dataset file, i am not able to download it.

[@bentleyopenflows]

Ahmad, please describe in more detail the problem you're having with downloading the dataset - are you signing into Bentley Communities without a problem? When you navigate to the page that has the dataset download, do you see the Download button? You can also post on the OpenFlows forum for a more immediate answer, as it is monitored more closely: bentleysystems.service-now.com/community?id=community_forum&sys_id=0310b7ca1b1a3110f3fc5287624bcb80

[@ahmadsohrab4724]

@@bentleyopenflows Dear Sir, Thanks for your soon reply I made an account, but when I want to enter the Bentley community. Welcome page appear and when I click to join. Then it can't take action, it's stopped. could you please help me or send me the data set files through my email? [e-mail] or through my Whatsapp number, [phone]. I need these files.

[@obiefunamonwe8759]

One of the worst. You can't just say what do you want to do, you have to mention the names of commands while talking. Alphabet very small on iPad and laptops and its hard visually track your mouse movements.