Technical Discussion on VPM

[Gopichand Paturi]

Hi Robert,
Small development in my understanding.

Please see this link
http://www.deepocean.net/deepocean/index.php?science04.php

In this if you actually go down the page where it's given to handle
reformulated VPM,
I see that the  initial radius is same across compartments is defined as
critical radius.
Also this value is a constant (based on experiments) so I think we can
proceed with this value which is of the order of microns.


So, I think this is a valid statement,


surface tension γ, the crumbling compression γc, the minimum initial radius
r0min, the regeneration time constant τR and a composite parameter λ. The
latter is related to the critical volume Vcrit. The parameters are the same
for each compartment.


Let me know your feedback.

Regards,
Gopichand.


On Sun, Mar 9, 2014 at 2:25 PM, Gopichand Paturi
<gopichandpaturi at gmail.com>wrote:

> Hi Robert (atdotde),
>
> First of all I wanted to get clear on the initial radius of bubble to be
> taken.
> So, as I went through the permeability theory I learnt that, solutions
> have inherently microbubbles called Nuclei of
> size[0.01MicroMeter-1Micrometer].
> that are at unstable equlibrium in every solution.
>
> I think we need to initialize bubble of each inert gas with the specific
> size in a compartment depending on the mixture of the gas. That means I
> think we need to put 3 bubbles in each compartment if it is a Trimix.
>
> So my idea is that we put the radius in order of some microns with the
> knowledge of nuclei of specific gas in the solution as the initial value.
>
> Please give me your suggestions and ideas regarding this.
>
> Thanks&Regards,
> Gopichand.
>
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