Diffusion equation: time for an element to diffuse at set distance

  • Thread starter jblakes
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Good morning,

I'm trying to workout the time for an element to diffuse at set distance in microns.

I have the distance, the diffusion coefficient, just unsure which equation I actually use.

X= sqrt DT or the other one x= sqrt 2DT.

I can't seem to figure out when you use one and not the other.

Thanks in advance
James
 
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Answers and Replies

  • #2
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Good morning,

I'm trying to workout the time for an element to diffuse at set distance in microns.

I have the distance, the diffusion coefficient, just unsure which equation I actually use.

X= sqrt DT or the other one x= sqrt 2DT.

I can't seem to figure out when you use one and not the other.

Thanks in advance
James
What is the exact situation you are looking at?
 

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