A Beginner's Introduction to Particle Image Velocimetry (PIV) using MATLAB - Part 1

In this video, I start a formal theoretical discussion on the basic idea of particle image velocimetry (PIV). Please use the following links to explore a bit further:
www.velocimetry...
www.lavision.co...
Support my work: www.buymeacoff...

[@maddie_d13]

super helpful, thank you

[@antoniosabatini-ih7bk]

bless you Sir

[@zugatzansa2156]

Great video! Thank you!

[@mrzach728]

what an engineer you're!!

[@navarshimahanta]

you made this so simple.. loved it.. thank you so much.

[@manishankaryadav7307]

Thank you for the clear content.

[@amonahud3250]

Thanks a lot for ur effort, this video is really helpful. I am using piv , How can I measure or calculate the particle size plz ?

[@TanmayAgrawal7]

You can calibrate your image (say by putting a ruler in your field of view) and then using that you can convert the particle size in pixel to physical size of particles.

[@amonahud3250]

@@TanmayAgrawal7 thanks a lot. Happy to hear from u.

[@RahmanIITDelhi]

If u can answer my simple question that would be very beneficial
1. What is the size of image in mb which Is getting generated
2. Why we are not taking a video
3. Why we need synchronisation if we can just continuosly keep on the laser and just click images...no need to synchronise the camera and laser on off..?

[@TanmayAgrawal7]

1. Can't remember but you can calculate from size of image. Maybe I'd say around an MB.
2. Originally we took a video and split it into images for analysis.
3. Some lasers can't run in continuous mode with high power. They need time to do the stimulated emission, therefore you need sync.

[@RahmanIITDelhi]

@@TanmayAgrawal7 thanks understood

[@yikunli5017]

Hello Tanmay, thanks a lot for your explanation. Since the laser sheet is very thin, what if particles move around and couldn't be illuminated by a laser beam? Won't this affect experiment results? Thank you!

[@TanmayAgrawal7]

Yes, the thickness of the laser beam plays a part. You may refer to a textbook for understanding better.

[@asharmd2001]

It is an excellent video bro. Will you be showing anything about plotting contour of mean velocity and mean Vorticity using Matlab after post proccessing? I know the questions are silly, but I'm a beginner in Matlab.

[@amonahud3250]

I am using piv in thermoacoustuc device oscillatory flow.The flow medium is air and smoke from insence sticks. Do u recommend me to keep using this type of smoke ??
Many thanks

[@TanmayAgrawal7]

Smoke is actually used, yes. So I don't see any problem. As long as there are no reactions taking place, it should be fine.

[@amonahud3250]

@@TanmayAgrawal7 so thankful to ur response. Wish u all the best.

[@GIAESunitaRaxed]

Thank you sir☺

[@juanantonioyanezvarela6698]

Nice video!
Thanks from Mexico!

[@TanmayAgrawal7]

Thanks for the comment.

[@luorisluo3634]

I like your video so much! thanks a lot

[@nadiacohen2352]

Why do you use a laser with a wavelength between 400-500nm?

[@TanmayAgrawal7]

We use a visible light generally, 532 nm.

[@user-hu2kf6vc1c]

Hi thank you for your awesome video, May I use the blueprint of the PIV(the picture with numbers 1, 2, 3, 4) for my school presentation? For reference, I go to high school.

[@TanmayAgrawal7]

Totally!

[@user-hu2kf6vc1c]

@@TanmayAgrawal7 Thank you!

[@baerenderwolf]

Hey, thanks for the nice PIV videos in your channel! Thats very much appreciated! We're planning to measure flow velocities of sediments in a settling chamber. As these particle have different sizes i want to calc velocities for different size ranges. Did you do calculate particle size distribution and categorized velocity estimations with piv already and could you provide information on that or even make a video? :) thanks again!

[@chilla01]

Hey, good afternoon. Do you think I can survey the velocity of the tide in situ in a lagoon by using the particles which are already flowing in the water (sand, phytoplankton etc). All the best, Ben

[@TanmayAgrawal7]

That's a good idea! Maybe! If the camera can distinguish then why not. But it might be tricky if sand for example is in contact with the bed too.

[@triwenibharti]

Thanku Tanmay

[@riteshprakash9472]

Very much useful :) :)

[@EDUCATOR_PK]

Hiiii sir how I can contact you

[@maheshtom9003]

Hello Tammy ..we are planning to build a PIV for our final year project..do youhave your paper regarding this or is there any way to contact you on Facebook/WhatsApp/phone

[@vaisakhn1149]

Hello, have you done this project. I would like to contact you.

[@setaretorabi2520]

@@vaisakhn1149 Hello, I would like to contact you cuz of your project

[@majidmalik876]

Hello dear!
Have you done with your project..if yes please share your paper/work via mail [e-mail]
Thanks granted.

[@notimportant8643]

This is way too quiet