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transport of diluted species
Posted Mar 16, 2016, 9:03 a.m. EDT Version 4.3 1 Reply
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Hi,
I am dealing with mass transfer from a sphere.
Initially I have dropped a sphere into a flowing stream (Velocity of stream is 'v') . The spherical particle flows along with the stream. The mass transfer takes place from the sphere into the surrounding fluid. Now if I consider mass transfer due to convection, which velocity should I consider? The velocity of the fluid or the relative velocity of the particle with respect to the flowing stream?
Please help me out with this.
I am dealing with mass transfer from a sphere.
Initially I have dropped a sphere into a flowing stream (Velocity of stream is 'v') . The spherical particle flows along with the stream. The mass transfer takes place from the sphere into the surrounding fluid. Now if I consider mass transfer due to convection, which velocity should I consider? The velocity of the fluid or the relative velocity of the particle with respect to the flowing stream?
Please help me out with this.
1 Reply Last Post Mar 17, 2016, 3:53 a.m. EDT
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Posted:
9 years ago
Hi
As far as I understand there is no velocity difference between the flow and a sphere floating in it, if the flow is laminar. Hence, the problem is purely diffusional. If the flow is turbulent, then it must be the relative velocity of the sphere and the liquid.
Lasse
As far as I understand there is no velocity difference between the flow and a sphere floating in it, if the flow is laminar. Hence, the problem is purely diffusional. If the flow is turbulent, then it must be the relative velocity of the sphere and the liquid.
Lasse