Chronology |
Current Month |
Current Thread |
Current Date |

[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |

*From*: Bernard Cleyet <bernardcleyet@redshift.com>*Date*: Sat, 15 Aug 2009 15:54:50 -0500

In searching for the validity limit of Poiseuille's law [length/ diameter > ?] I found a paper on the validity of Kozeny-Carman formulae in porous media (e.g. sandstone) using lumped resistance meshes!!

bc gave up

BTW anyone know if (length / diameter) > 10 is "good"? I suppose it'll vary according to the flow rate (changing the Reynolds' #), etc.

p.s. for the curious:

http://www.osti.gov/bridge/servlets/purl/10113412-EeskIR/webviewable/ 10113412.pdf

On 2009, Aug 14, , at 15:35, John Denker wrote:

I don't recall hearing or reading anything about non-ideal

transformers or mutual inductances ... but they *did* tell

us "the same equations have the same solutions" and if we

live to be 2000 we will never forget that. And the equations

for inductors are almost the same as the equations for

capacitors, given a trivial change of variables.

**Follow-Ups**:**Re: [Phys-l] transformer question***From:*Brian Whatcott <betwys1@sbcglobal.net>

**References**:**[Phys-l] transformer question***From:*Mangala Joshua <mjoshua@mesacc.edu>

**Re: [Phys-l] transformer question***From:*Brian Whatcott <betwys1@sbcglobal.net>

**Re: [Phys-l] transformer question***From:*Bernard Cleyet <bernardcleyet@redshift.com>

**Re: [Phys-l] transformer question***From:*John Denker <jsd@av8n.com>

- Prev by Date:
**Re: [Phys-l] transformer question** - Next by Date:
**Re: [Phys-l] Euler Buckling springs** - Previous by thread:
**Re: [Phys-l] transformer question** - Next by thread:
**Re: [Phys-l] transformer question** - Index(es):