How to get a connection between alpha and z.

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Dereje 2018-3-27

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https://ww2.mathworks.cn/matlabcentral/answers/390954-how-to-get-a-connection-between-alpha-and-z

评论： Dereje 2018-3-27

PlumeModeling.pdf

By using ODE 45 I have results for the three unknowns. My question is to get a closer, there should be some value of the constant alpha. But in theory alpha is related to w(vertical velocity). My question is if I set some value for alpha initially, is there any means to calculate for alpha for the value of z. I have been asked to get the relationship between alpha and z or to plot a graph.

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Torsten 2018-3-27

Does that mean that alpha is 0.12 all the way?

If you set alpha = 0.12 in your model, it is used all the way with this value. This does not mean, of course, that alpha does not change with height in reality.

also is there any way that I can calculate another alpha(for example) by using the other unknowns

No, you can't calculate alpha from the other unknowns, but if you have a hypothesis how alpha depends on another unknown / other unknowns, you can set alpha as a function of this/these unknown/s .

Best wishes

Torsten

Dereje 2018-3-27