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Search: Posts Made By: lucamirtanini
Forum: Main CFD Forum February 5, 2019, 16:02
Replies: 14
Views: 1,132
Posted By lucamirtanini
Does phi' go like 1/sigma, because the top hat...

Does phi' go like 1/sigma, because the top hat function can mimic the peak (As also FMDenaro said) ? or they are not related
Forum: Main CFD Forum February 5, 2019, 10:40
Replies: 14
Views: 1,132
Posted By lucamirtanini
Yes, but in any case I cannot understand why phi'...

Yes, but in any case I cannot understand why phi' should decrease as k/sigma.



Yes I think that are discussed both, but I dont understand why if it is of finite width it decreases as k/sigma
Forum: Main CFD Forum February 5, 2019, 07:55
Replies: 14
Views: 1,132
Posted By lucamirtanini
In this case my problem concerns a narrow spike...

In this case my problem concerns a narrow spike with a finite width. I attached the part of the book that highlight this concept
Forum: Main CFD Forum February 5, 2019, 07:27
Replies: 14
Views: 1,132
Posted By lucamirtanini
Thank you. I am happy that I was thinking the...

Thank you. I am happy that I was thinking the same thing. But the book says that a characteristic function of spike decrease as k/sigma.
My doubt is the fact that if you consider the characteristic...
Forum: Main CFD Forum February 5, 2019, 06:08
Replies: 14
Views: 1,132
Posted By lucamirtanini
I know that! Indeed I was taking the top-hat...

I know that! Indeed I was taking the top-hat function as example for an other question
Forum: Main CFD Forum February 5, 2019, 03:55
Replies: 14
Views: 1,132
Posted By lucamirtanini
Sorry if I write again here. Unfortunately, also...

Sorry if I write again here. Unfortunately, also after a deep study of the fourier transform, I am still having a lot of unresolved doubt.

1. I have not understand if in the graph 6.5 appear just...
Forum: Main CFD Forum February 1, 2019, 15:51
Replies: 14
Views: 1,132
Posted By lucamirtanini
I'll look into it... thank you (merci:D)

I'll look into it... thank you (merci:D)
Forum: Main CFD Forum February 1, 2019, 12:40
Replies: 14
Views: 1,132
Posted By lucamirtanini
effect of spikes on the probability density function

Hi all,
I have some question about the effect of a spike in a probability density function:

1. Why do a spike in B(u) produces a component with characteristic function that behaves as Aexpiks ?...
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