Fick's First Law of Diffusion

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  • Опубліковано 10 гру 2024

КОМЕНТАРІ • 71

  • @frankfei9130
    @frankfei9130 10 років тому +26

    You did a much better job than the textbook I am reading on explaining what flux and fick's first law really means. I really appreciate the part that you showed how to derive the unit of J. That is so helpful. Keep up the great work, looking forward to seeing more fantastic teaching videos from you. Billion thanks.

  • @bosicsbenom8788
    @bosicsbenom8788 3 роки тому +4

    I was almost crashed by my assignment, but thanks to you I understand the law very well. 😁guess I am ready to teach others

  • @neenoo12345
    @neenoo12345 8 років тому +8

    Such a great video, you made the concept very clear and easy, instead of other science-y vids where I pause every 5 seconds trying to process what just happened!

  • @AndreiGavrea
    @AndreiGavrea 7 років тому +4

    Thank you very much for the video! I think nobody else explained what the negative sign of the diffusion coefficient actually stands for.

  • @EngineerClearly
    @EngineerClearly  12 років тому +3

    Thank you and you're completely right - I was just hinting at the calculus and should have directly stated it. When I remake this I'll make sure to add that in.

  • @aismoyoy6745
    @aismoyoy6745 9 років тому +1

    a huge " thank you " from Algeria .wonderfully explained

  • @IslamNegm
    @IslamNegm 9 років тому +6

    I think it's better to think of D (diffusion factor) as it's (mean length * the avg velocity of particle) >> D = l*c , because D = A/t is not making any sense.
    because if we developed this term in microscopic terms in 3-dimensions , D will be = (1/3) (mean length * the avg velocity of particle in the direction of l )
    correct me if I am wrong, please :)
    Another small comment on the video:
    You've typed D = Area/s

    • @RoniPhD
      @RoniPhD 9 років тому +2

      +Islam Negm
      It is a good way to think about it. Since Fick´s equation is a constitutive relation, in continuum mechanics you will have a second order tensor to represent this ability of A to diffuse into B, and due to randomness of the microscopic phenomena I would speculate and say it should be isotropic like Newton´s viscous stress in fluid mechanics.
      Then the vector Ji should be the result from the inner product between Dij and CA,j where CA is the concentration of A scalar field and comma convention is used for the derivative in the j-th direction

    • @jonny2575
      @jonny2575 7 років тому +1

      I like math cause I can say: AttentionWhore = Area/time. As long as it's explicitly defined, I can always tailor it to my understanding. Mean and average it... do it big baby. I'll stick with the general idea for now though. Anyway great critique ^_^, thanks a lot.

  • @sabirina498
    @sabirina498 4 роки тому

    HI from 2020 😂...I want to say thank you so much...it was really a good explanation...Thanks from Algeria

  • @msrasras
    @msrasras 6 років тому

    Great job sir, you infused Fick's first law with life.

  • @madeinfrance06
    @madeinfrance06 13 років тому +2

    great video thanks , keep it clear and straight to the point like u did ... i would only add a quick common example of question and resolve it real quick ( with easy numbers just to understand how u make it work )

  • @juanramonavendano2845
    @juanramonavendano2845 4 роки тому +2

    Thank you for a clear and direct explanation. Could you tell me what is the software to do presentations like this one ? I found it very dynamic and useful . Fantastic combination of visual elements and dynamic development of the theory !

  • @meiling6177
    @meiling6177 11 років тому +3

    thanks for your nice explanation. how is the second law?

  • @celinematar9201
    @celinematar9201 8 років тому +1

    hello, very good explanation, can you tell us on which software did you make this video ? thank you

  • @1997vergil
    @1997vergil 7 років тому +1

    Great work, thank you for the really useful lecture. Respect

  • @SharpSniper10
    @SharpSniper10 8 років тому +10

    Who is here from the lovely Dr. Iyer?

  • @anatolbeck1992
    @anatolbeck1992 13 років тому +1

    Wow what a fantastic explanation!

  • @miko1516
    @miko1516 8 років тому +1

    Thanks, but how to apply Fick's law if we just have the concentration / Absorbance?

  • @Jebuschic101
    @Jebuschic101 11 років тому +2

    Thanks for the video. How would one calculate the concentration of A at point 2? Knowing the diffusion coefficient and the distance from z1 to z2, I can't figure it out. Was trying to figure out the flux, but I need C2 to do that!

  • @A2Kaid
    @A2Kaid 12 років тому

    J= -D (∆C/∆X)
    Flick's Diffusion equation. J = Flux, -D = Diffusion coefficient, ∆C = Concentration Gradient, and ∆X = Distance.

  • @foreverblink2601
    @foreverblink2601 4 роки тому

    Thank you! You really made it easier!

  • @shengyuanyi
    @shengyuanyi 12 років тому

    That is awesome. I was always wondering why Fick's Law study flux instead of flow rate. Then I understand it. Thanks

  • @auwylim
    @auwylim 9 років тому +10

    thank you , you are much much much much better than my shitty professor

  • @adindatisha9567
    @adindatisha9567 9 років тому +1

    Thank you. This video helps me so much

  • @rubanakakodker8914
    @rubanakakodker8914 11 років тому +1

    Thank you for a wonderful explanation..

  • @jhanolaer8286
    @jhanolaer8286 2 роки тому

    Hi sir,how to solve/find the vector of this diffusion?

  • @vignesh8507
    @vignesh8507 7 років тому

    super explanation ..... thank u sir

  • @galvintang6746
    @galvintang6746 4 роки тому

    Why is Z the area? If it is the area, and C has a unit of particles per volume, and D has a unit of area over time, then Flux will have a unit of (number of particles)/(volume*time) right? So if Z is the distance, then it makes more sense. Is it correct?

  • @baudeagle1
    @baudeagle1 12 років тому

    Is Darcy's flow equation related to Fick's laws? Looking at Darcy's flow this seems to be applicable to liquids but the it also seems similar to Fick's equations.

  • @IvCastilla
    @IvCastilla 6 років тому

    Good explanation
    Thank you

  • @YounesYousafi
    @YounesYousafi 6 років тому

    very well explained, thanks for sharing

  • @djkdenny
    @djkdenny 12 років тому

    Very well explained. Thank you.

  • @Bluebomberman
    @Bluebomberman 6 років тому

    Thanks i really appreciate your work

  • @huwjonesification
    @huwjonesification 12 років тому +1

    Thank you so much! I was so stuck on this for ages. Fick's law is used in the reactor physics, and all the explanations are so rubbish!

  • @BanditPharmD
    @BanditPharmD 12 років тому

    Where does partition coefficient come into play?

  • @zunaidazakaria8606
    @zunaidazakaria8606 11 років тому +1

    Really interesting and thank you for the explanation :D

  • @josenintendo1
    @josenintendo1 12 років тому

    how come books don't explain it as well, after i watched ur video i was able to understand it way better, thanks

  • @ben5234
    @ben5234 12 років тому

    Hey nice video helped me a lot, but i would maybe explain further that the d's dont simply change to delta because they are small, but they are from integrating the equation with limits.
    Anyway, thank you :)

  • @devwatch6305
    @devwatch6305 8 років тому +2

    Thank You so much You help me a lot

  • @samgonzalez7302
    @samgonzalez7302 10 років тому +1

    mad sick bro.

  • @EngineerClearly
    @EngineerClearly  13 років тому +2

    @anatolbeck1992 Really? Thank you - I appreciate that.

  • @mustafa3511
    @mustafa3511 2 роки тому

    perfect video thanks

  • @Sophia-ui6xo
    @Sophia-ui6xo 5 років тому

    what "C" and the "hashtag" express PLEASE ??

  • @anatolbeck1992
    @anatolbeck1992 13 років тому +1

    yes i study physics in vienna and im about to derive the thermodynamic formula and the fluid dynamics but i had some problems to follow fick's derivation. I searched for an explanation on the internet and the first "usable" video was yours! Very nice work...but the circumstance depending D which is : Mean free path*mean velocity/3 can't be reconstructed by your idea...i tried it...maybe you can text me how you got the D...thanks and merry christmas!

  • @jasonwoo6687
    @jasonwoo6687 12 років тому

    i hope you can speak slowly,or add subtile.cuz im not good at english.anyway,i think this video is helpfu.thank u

  • @lordfarquaad9887
    @lordfarquaad9887 2 роки тому

    thank you so much

  • @EngineerClearly
    @EngineerClearly  12 років тому +1

    Thank you and I really don't know.

  • @Climstork
    @Climstork 12 років тому

    Merci pour l'explication :)
    Can you explain the second Fick's law please ? I'm lost :)

  • @datauv-asia
    @datauv-asia 11 років тому +1

    yes, it is great !

  • @EngineerClearly
    @EngineerClearly  12 років тому +2

    I had to Google Merci pour l'explication
    Thanks you! :)

  • @SuperTf2rocks
    @SuperTf2rocks 5 років тому +1

    DAB!!!

  • @hsoley
    @hsoley 9 років тому +2

    Nice!

  • @veteranrider6020
    @veteranrider6020 7 років тому

    good job

  • @GuptaPeruri
    @GuptaPeruri 11 років тому +1

    but the flux J is not with respect to stationery coordinates!!

  • @kgjkhfghvjkggjdf7318
    @kgjkhfghvjkggjdf7318 5 років тому +1

    C'est une belle video mais je ne compris pas la langue bien parce que en Algérie on étudier la langue française😢😢😢

  • @futbolscoop
    @futbolscoop 3 роки тому

    Thanks

  • @TheSrb1992
    @TheSrb1992 12 років тому

    thank u very much

  • @StephenRayner
    @StephenRayner 12 років тому

    THANK YOU SO MUCH!!!!!

  • @saraherself98
    @saraherself98 7 років тому

    Thank you very much sure :)

  • @تقىكمال-ص7ط
    @تقىكمال-ص7ط 7 років тому

    perfect

  • @arcturus3110
    @arcturus3110 12 років тому

    thank u........

  • @diodiof2959
    @diodiof2959 5 років тому

    thnx

  • @kittycat1768
    @kittycat1768 8 років тому

    Grade 10 Biology why you gotta be so hard

  • @Tyandaga
    @Tyandaga 8 років тому +1

    So dry xD , good try though ^.^