How to draw a flow net by hand and use it to estimate water flow through soil
Пікірлер: 66
@OsmanOsman-cu1ic3 жыл бұрын
wow ... that moment when you realize that a 13 mins vidoe is 1000 times better than a 2 hours long lecture at the university. thank you so much Phil keep it up!
@geobeta13513 жыл бұрын
right! Better than my post post post doc professor
@andyd41376 жыл бұрын
Mate you are a legend. Very well explained. Thank you so much.
@jacobacunavirgen14745 жыл бұрын
Thank you so much Phil! I am enrolled in an intro course to Geotech right now and my professor goes way too fast when explaining concepts. Your explanation is spot on and clear. Thank you for sharing!
@Subtleflashbang5 жыл бұрын
It is the circles, guys. You have to have 4 tangent lines surrounding a circle. 1. You start with the equipotential lines at the ground level and impermeable layer 2. Then you draw flow lines than are parabolas that end perpendicular to the ground equipotential line. You can make how many you feel is right. (The fewer lines the bigger the circles you'll imagine later are going to be, the more lines, the more circles you'll have to draw but it'll be more accurate) 3. (The most difficult part.)Draw parabolic equipotential lines that are (1) perpendicular to all flow lines they cross and (2) a circle can be drawn in the resulting inner area that all sides touch the surrounding lines at one point (tangent lines to the circles) 4. Count-out flow channels and drops. I'm just a student btw, this just what I got from the video.
@ajayveersogarwal54114 жыл бұрын
Thanks from India... Very helpful... Demonstration
@xd7omiix6 жыл бұрын
Thank you from Saudi Arabia
@nurlanallahverdiyev65854 жыл бұрын
Thanks a lot , you saved a lot of time of us . We appreciate it!
@sabinkatuwal79045 жыл бұрын
Thank you Phil..... Lots of love for you .....
@riposelectures2 жыл бұрын
Much love from RIPOSE LECTURES
@rajeevsorokhaibam14504 жыл бұрын
Im having a hard time concentrating on your lecture wondering how you wrote it backwards and explain it at the same time 😅😅.. That's just wowwwwwww👍👍👍👍👍👍
@77brasileiro7 жыл бұрын
Are you writing backwards?? My mind is blown!
@duerf58267 жыл бұрын
I can write backward. With a little practice it's not too hard.
@GeorgeBates-uk7 жыл бұрын
They probably reflected the footage after recording - my guess
@philrenforth95696 жыл бұрын
They? If only I had a production team.
@leventyenmez81326 жыл бұрын
Hi Phil, why don't you make a video about hardening soil material behaviour?
@shivamb.39733 жыл бұрын
He is just mirroring the video
@kiboinderitu84315 жыл бұрын
Thank you man, much appreciated from Kenya. (student)
@MasterCivilEngineering3 жыл бұрын
Watch here
@ketandharme55234 жыл бұрын
Good explanation sir👍👍
@tanviraraf6 жыл бұрын
you're great, i could easily grab this topic onto my head
@theleieisoe81285 жыл бұрын
Thank alot for sharing about soil mechanics
@aussie38515 жыл бұрын
Massive help, thanks!
@pisangperme24104 жыл бұрын
thank you sir for clearing our concept
@python-af3 жыл бұрын
An example of unconfined flow with a sheet pile driven halfway into an aquifer is shown in Fig. 7.19(which is same is the figure you have drawn.). The flow net is horizontally symmetrical, providing that the top and bottom flow lines (borders) are parallel and the penetration of the sheet pile is exactly one-half the depth of the aquifer. Note that the number of flow channels Nf is 3 and the number of equipotential drops N dis 6. Regardless of how many flow channels you use, the Nf!Nd ratio, or the shape factor, will always be 1/2 for the geometry of this example! any comment on this?
@kiranharipradhan81587 жыл бұрын
Thank you so much for clear explanation.
@nandythakur27703 жыл бұрын
Beside of anisotropic condition can flow net change due to other reasons like head, permeability etc
@MasterCivilEngineering3 жыл бұрын
Step by step video solutions of civil engineering questions
@siyandamadlala65614 жыл бұрын
Thank you
@tariqmahmud11636 жыл бұрын
Thanks from Bangladesh
@ConnorHopkins16 жыл бұрын
You are awesome!
@carltolentino20443 жыл бұрын
It is actually 12,622.78 liters per year sir. That 35 liters is per day.
@mdabdurrazzak79616 жыл бұрын
Thanks.
@MrMrilikepie12344 жыл бұрын
I often see values of 5.6,6.5,4.5, etc. when calculating Nf. How on earth is this possible if calculating the #of flow paths? Shouldn't this always be a whole number? Or does this only apply to anisthropic materials?
@ryancowles56336 жыл бұрын
Phil how do you know how many flow lines and equipotential lines you need? I've read everywhere and no one gives me a straight answer or an equation to follow. Thank you!
@philrenforth95696 жыл бұрын
Hi Ryan, good question. It doesn't matter for the maths as the number of equipotential lines will also increase. If you stick to the rules you should end up with the same Nf/Nh no matter how many flow lines are used. In practice, a flow net with too many lines is tricky to draw. Remember, you'll be rubbing things out and redrawing as you go along.
@ernestsand64255 жыл бұрын
We have the same unanswered question
@ayadhoussemeddin91435 жыл бұрын
thanks
@nellvincervantes32234 жыл бұрын
Question sir. How do you find the pore pressure of a certain point if it is located at the very center of equipotential line? We know that pore pressure = 9.81(H + h - mH/nd) Where H = head of water h = height of saturated soil above the point of interest m = number of equipotential drops from zero to point of interest nd = total number of equipotential drops. So how would you know the value of "m" in that case?
@user-fg6bq6ve2p5 жыл бұрын
Thank you I love you
@JMzXD4 жыл бұрын
tq 🙏
@antoniuswayan24867 жыл бұрын
thanks, this helped me :)
@UpperXEgo4 жыл бұрын
cool
@kiboinderitu84315 жыл бұрын
Yo, isn't the differernce between the 2 hights 7m, on the diagram.
@AB-gu9ui4 жыл бұрын
no the heights are 2m and 1m. But I understand the 2 looks like an 8
@abdallehassan35975 ай бұрын
@@AB-gu9ui thanks bro 😫
@i6tir Жыл бұрын
How does he write upside down?
@LuzEngineering6 жыл бұрын
Thank you so much this helped a lot
@surferrosa72854 жыл бұрын
Wouldn't (4x10^-7 m^3/s) = (0.03456 m^3/day) = (12.61m^3/yr) = (12,600 L/yr) ? I think the value you calculated was the daily value and not the yearly. Although it seems like too large a value
@asdfasd80496 жыл бұрын
Very helpful video. I have a question about the units. I realize that flow is expressed in volume per time, but if K is in (m/s), and H is in (m), should Q be in (m2/s)?
@philrenforth95696 жыл бұрын
Great spot with the units! It's really m3/s per m of hydraulic structure (if you imagine the structure coming out of /going into the screen).
@asdfasd80496 жыл бұрын
Oh, I see. Thanks a lot.
@kumarbanjara72293 жыл бұрын
pls consider wearing dark shaded shirt
@wyanz45666 жыл бұрын
thank you :D
@pullbale93556 жыл бұрын
Thanks! I'd say that it would be better if you wore dark clothes so that we could see the light lines and words on the board
@philrenforth95696 жыл бұрын
Yeah, maybe I will next time. I was worried about becoming a floating head, which may have been even more troubling
@jeremiahaquitania47995 жыл бұрын
hahahahaha!
@ali1983maha5 жыл бұрын
@@philrenforth9569 😂
@honzajansky29384 жыл бұрын
The result should be 35 liters per day not per year
@kevinnjenga89787 жыл бұрын
Hi I i thought H was 8m -1m??
@philrenforth95696 жыл бұрын
Not sure where you got your values, but H (or really 'delta' H) is the pressure difference across the system. In this case 1m.
@joshuariosa57566 жыл бұрын
Is the left water height 2m? Because it looks like 8 also.