Very cool little flume. A simple 'modification to your modification to control flow' would be to add a tee and bypass valve in the pump output line to allow excess flow to be routed directly back into the sump. It'll let you run the pumps at full rated output and reduce stress on the motors. Maybe not a big deal for cheap, submersible pumps. Definitely worth doing if you go to an air-cooled, AC centrifugal pump.
very cool! Would you mind sharing more information on the measurements of the pieces and your suppliers. Would love to build a couple for my students to enhance their learning. Thanks
I guess it depends on the power converter used in those pumps, but probably you can use some cheap voltage regulator to control the waterflow a little bit.
Yep this was one option I considered. But the problem if you adjust the total power to the pump is you also lose total pressure head in the system when you reduce it, whereas a valve at the inlet maintains the same total pressure head but allows you to adjust the discharge. It’s a great solution if you have lost of pressure to spare, but my little pumps only just about lift the water from the tank 1m up to the flume. In the future, however, I would like a system where the discharge could be computer controlled, and this would be the best solution for that.
Awesome set up you've got there mate, looking forward to see it involve into the future. Have a question what formula do you use to size water ring mains? and what additional formula would you use to calculate rings mains looping off first ring main. Is it the hardy cross method ?
Hi I am a high school teacher and would love build a flume. Is there a good site where I can get designs for a project like this and materials so I can budget it out? Any suggestions?
Hi, thanks for the interest. I'm not aware of any existing sites that would provide all the details, but feel free to drop me an email on james@jhart.co.uk and I'd be happy to share some thoughts about the project/materials/my designs.
I am wondering what you would use to measure the actual vertical velocity profile in the middle of the tank or around some obstructions within your flume?
Thanks for the interesting comment. There are several methods you could use, but no method of measuring accurate variation in velocity is particularly easy. One way would be to film the flow and inject some neutrally buoyant particles. There is some good open-source software you could then apply to the video that would work out velocity vectors based on the movement of the particles.
Hello, Is there a way to get in touch with you regarding image permissions? I would like to use a still from one of your great videos in a publication.
So cool! Thanks for the shoutout, and congrats on such an awesome project.
I'm glad to be part of the 100,000 that will make happen the centrifugal pump video. Great stuff.
What are the dimensions of your flume? And that is 10mm acrylic? Correct.
Very cool little flume. A simple 'modification to your modification to control flow' would be to add a tee and bypass valve in the pump output line to allow excess flow to be routed directly back into the sump. It'll let you run the pumps at full rated output and reduce stress on the motors. Maybe not a big deal for cheap, submersible pumps. Definitely worth doing if you go to an air-cooled, AC centrifugal pump.
Thanks for the comment, something to consider for the next version!
very cool! Would you mind sharing more information on the measurements of the pieces and your suppliers. Would love to build a couple for my students to enhance their learning. Thanks
Hi, thanks for the comment and interest! Please feel free to drop me an email at james@jhart.co.uk. I’d be more than happy to chat about the design!
Fascinating stuff!
Your channel should be bigger!
Thanks!
🙂 Lots of work, great job 👍
Thanks!
What a fantastic video and project!
I guess it depends on the power converter used in those pumps, but probably you can use some cheap voltage regulator to control the waterflow a little bit.
Yep this was one option I considered. But the problem if you adjust the total power to the pump is you also lose total pressure head in the system when you reduce it, whereas a valve at the inlet maintains the same total pressure head but allows you to adjust the discharge. It’s a great solution if you have lost of pressure to spare, but my little pumps only just about lift the water from the tank 1m up to the flume. In the future, however, I would like a system where the discharge could be computer controlled, and this would be the best solution for that.
Great work ! were you able to create a hydraulic jump in the flume ?
Thanks for the comment. Absolutely! I hope to make a full video about them one day, but there is a little preview at 6:28 on this video!
@@fluidsexplained1901 I see it ! my untrained eye missed it the first time... So great for teaching, thank you
Nice work my friend ,nothing beats a good practical.👌👍👍
Thanks for the comment!
Could you potentially use a thick sponge(s) as a flow buffer at the inlet? Almost like tiny mangroves?
Awesome set up you've got there mate, looking forward to see it involve into the future. Have a question what formula do you use to size water ring mains? and what additional formula would you use to calculate rings mains looping off first ring main. Is it the hardy cross method ?
Hi I am a high school teacher and would love build a flume. Is there a good site where I can get designs for a project like this and materials so I can budget it out? Any suggestions?
Hi, thanks for the interest. I'm not aware of any existing sites that would provide all the details, but feel free to drop me an email on james@jhart.co.uk and I'd be happy to share some thoughts about the project/materials/my designs.
I am wondering what you would use to measure the actual vertical velocity profile in the middle of the tank or around some obstructions within your flume?
Thanks for the interesting comment. There are several methods you could use, but no method of measuring accurate variation in velocity is particularly easy. One way would be to film the flow and inject some neutrally buoyant particles. There is some good open-source software you could then apply to the video that would work out velocity vectors based on the movement of the particles.
Hello, Is there a way to get in touch with you regarding image permissions? I would like to use a still from one of your great videos in a publication.
Wonderful work, by the way!
Thanks!
I've sent an email to the email address on your channel.
By the way, does anyone know how to directly contact the "Fluid Explained" host James? thanks
Hi, thanks for the comment and interest! Please feel free to drop me an email at james@jhart.co.uk. I’d be more than happy to chat about the design!
hi, do you tutor?
𝐩яⓞ𝓂𝓞Ş𝐦 😢