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transport of diluted species

Posted 2018年3月26日 GMT+2 05:11Porous Media FlowVersion 5.31 Reply

小杰 莫
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hello I am simulating NH4-N reduction process when there is microbe existing in the groundwater,while I find the concentration drops fast in just one days and keeping almost the same later.I wanna know how to solve the problem and why this phenomena exists. Any help is appreciated.

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1 Reply Last Post 2018年3月26日 GMT+2 13:07
Lasse Murtomäki
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Posted: 7 years ago 2018年3月26日 GMT+2 13:07

Hi

First, look at the concentration scale, the concentration drops only less than 1%. What is the size of the droplets? In the small scale diffusion is very fast, especially in spherical symmetry. Therefore, steady-state is reached almost instantaneously. You did not give any closer details, so it is difficult to comment any further.

BR Lasse

Hi First, look at the concentration scale, the concentration drops only less than 1%. What is the size of the droplets? In the small scale diffusion is very fast, especially in spherical symmetry. Therefore, steady-state is reached almost instantaneously. You did not give any closer details, so it is difficult to comment any further. BR Lasse

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