User talk:Larrybaxter

Welcome!

Hello , and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay.

In Wikipedia, new Users do not automatically receive a welcome; not even a machine-generated welcome. Welcome messages come from other Users. They are personal and genuine. They contain an offer of assistance if such assistance is ever desired.

I suggest to everyone I welcome that they may find some of the following helpful &mdash; there’s nothing personal in my suggestion and you may not need any of them: I hope you enjoy editing here and being a Wikipedian! If you need help, check out Questions, ask me on my talk page, or place  on your talk page and ask your question there. Again, welcome! Dolphin (talk) 07:01, 11 April 2010 (UTC)
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Citing of sources
Hi Larry! On 11 April you made an edit to Vortex. Your edit included some significant statements, but no in-line citations or extra references to enable independent verification of your statements.

On Wikipedia, citing of sources is very important. See WP:Citing sources. If a statement is not supported by an in-line citation or some other form of reference it is likely to be regarded merely as original research. Original research is not permitted on Wikipedia. See WP:NOR.

I question some of the text you have added.

1. Perhaps unexpectedly, not all vortices possess vorticity. Why do you believe this to be true? In the absence of vorticity, the circulation is zero. If the circulation is zero there is no vortex present.

2. The vorticity of a free vortex is zero. See 1. above.

3. By contrast, fluids that initially have vorticity, such as water in a rotating bowl, form vortices with vorticity, exhibited by the much less pronounced low pressure region at the center of this flow. Why do you believe this to be true? Are you suggesting that the low pressure region at the center of a flow is more pronounced in a fluid that initially has zero vorticity? If the low pressure region at the center of one flow is more pronounced than at the center of another flow, Bernoulli's principle predicts that the speed of flow will be faster where the pressure is lowest. The flow with the faster speed will have the greater circulation and so the greater vorticity.

Some introductory information about creating in-line citations is available at WP:CTT. Dolphin (talk) 07:28, 11 April 2010 (UTC)