Negative Flow in tank Top inlet fill

Hello Ragavendra,

I am seeing positive flow in the inlet pipes for both T-1 and T-3 in the model provided (using the average daily demand scenario). One thing you can try is to move just the .wtg and .wtg.sqlite files into a new folder, then recompute the model. If there is an issue with one of the supporting files, this may help. You can also try upgrading to the latest version. 

Also, let us know if you are getting any red user notifications. I am not seeing any, but if you are, the results should not be trusted until it is resolved.

Regarding the pressure and velocity results, are there any specific elements you are concerned with? I am not seeing negative pressures or other extreme results, but if you are getting any red user notifications, you may see results that don't make sense.

Regards,

Scott

Hi Scott,

Thanks for the prompt reply!

I am using Watergems 10.02.02.06. So I need to upgrade the version will fix this issue?

Thanks & Regards,

V.Ragavendra

Hello Ragavendra,

My colleague Scott has provided a link to our article which will guide you to download and install our products. You can download the latest version of WaterGEMS i.e. the CONNECT Edition Update 2.3 (v 10.02.03.06) by following the steps provided in the article. Here is the link to the article;

Downloading OpenFlows | Hydraulics and Hydrology Software

Hope this helps.

Hi Yash,

As discussed, I updated latest version but the issue not yet fixed.

https://wetransfer.com/downloads/e3666b0867623dd7b7e92d5edf09189e20200220144729/58f8ce

Please check and revert me for the same.

Thanks & Regards,

V.Ragavendra

Hello Ragavendra,

These results do not seem out of line for the setup of the system. The flow out is positive, meaning that the net flow is such that the tank is emptying. There are likely demands downstream that need to be satisfied, or the elevation in a downstream tank is lower than the elevation of the tanks you are referencing. 

However, if you look at the actual flow in the inlet pipes for the two tanks (P-9 and P-3259), the flow reported in the pipes is positive. So there is positive flow going into the tank from the inlet pipes. It is only that the flow out of the tank is higher because of downstream demands and/or balancing the hydraulic grade in the system.

Regards,

Scott

Hello Ragavendra,

These results do not seem out of line for the setup of the system. The flow out is positive, meaning that the net flow is such that the tank is emptying. There are likely demands downstream that need to be satisfied, or the elevation in a downstream tank is lower than the elevation of the tanks you are referencing. 

However, if you look at the actual flow in the inlet pipes for the two tanks (P-9 and P-3259), the flow reported in the pipes is positive. So there is positive flow going into the tank from the inlet pipes. It is only that the flow out of the tank is higher because of downstream demands and/or balancing the hydraulic grade in the system.

Regards,

Scott