[CIG-LONG] CIG-LONG Digest, Vol 50, Issue 1

[Brian Wilson]

Hi guys,

Thanks for responding.

Laetitia: Pa = kg/(m.s^2), so W/m^3 turns out to be kg / (m.s^3), and I
still have the cubed time in the denominator.

Patrice: Oh ok thanks. I think my problem was that I was putting in
kg/(m.s^3) directly instead of converting to K/s/kg.

Brian

On Wed, Jan 26, 2011 at 1:00 PM, <cig-long-request at geodynamics.org> wrote:

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> Today's Topics:
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>   1. Question on scaling (Brian Wilson)
>   2. Re: Question on scaling (laetitia le pourhiet)
>   3. Re: Question on scaling (Patrice Rey)
>
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 25 Jan 2011 18:46:23 -0700
> From: Brian Wilson <bjwilson83 at gmail.com>
> Subject: [CIG-LONG] Question on scaling
> To: cig-long at geodynamics.org
> Message-ID:
>        <AANLkTimXy1bORR-2kueOzaiLvrFKCz3a9F537aS=7GMz at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello,
>
> I'm having some problems with the scaling in GALE, which is causing
> problems
> with convergence. The worst problem seems to be the scaling of crustal heat
> production. Since this quantity involves Watts, seconds^3 appears in the
> denominator. Thus, scaling seconds up to millions of years creates huge
> numbers that are something like 10^60, even with a small offset from
> scaling
> kg up to a larger denomination. Has anyone else had this problem?
>
> Thanks,
> Brian
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> ------------------------------
>
> Message: 2
> Date: Wed, 26 Jan 2011 11:21:30 +0100
> From: laetitia le pourhiet <laetitia.le_pourhiet at upmc.fr>
> Subject: Re: [CIG-LONG] Question on scaling
> To: cig-long at geodynamics.org
> Message-ID: <4D3FF5AA.1080703 at upmc.fr>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Brian,
>
> Since you don't have kg in gale scaling... why not use the fact that
> Watt are
> N.m.s-1 which turns into Pa/m/s.
>
> Laetitia
>
> Le 26/01/2011 02:46, Brian Wilson a ?crit :
> > Hello,
> >
> > I'm having some problems with the scaling in GALE, which is causing
> > problems with convergence. The worst problem seems to be the scaling
> > of crustal heat production. Since this quantity involves Watts,
> > seconds^3 appears in the denominator. Thus, scaling seconds up to
> > millions of years creates huge numbers that are something like 10^60,
> > even with a small offset from scaling kg up to a larger denomination.
> > Has anyone else had this problem?
> >
> > Thanks,
> > Brian
> >
> >
> > _______________________________________________
> > CIG-LONG mailing list
> > CIG-LONG at geodynamics.org
> > http://geodynamics.org/cgi-bin/mailman/listinfo/cig-long
>
> --
> *Dr Laetitia Le Pourhiet*<\n> MCF - Institut des Sciences de la Terre
> Paris - UPMC<\n> tel : +33 1 44 27 58 83<\n> web :
> http://perso.numericable.com/laetitia.le.pourhiet/index.html<\n>
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> ------------------------------
>
> Message: 3
> Date: Thu, 27 Jan 2011 06:40:19 +1100
> From: Patrice Rey <patrice.rey at me.com>
> Subject: Re: [CIG-LONG] Question on scaling
> To: Brian Wilson <bjwilson83 at gmail.com>
> Cc: cig-long at geodynamics.org
> Message-ID: <FF7DB689-419B-4AA1-AF47-3090026B5AF5 at me.com>
> Content-Type: text/plain; CHARSET=US-ASCII
>
> Hi Brian
>
> My understanding is that in the energy equation the radiogenic heat
> production is in Kelvin per seconds per kilogram.
>
> Example.
> Heat production: 1e-6 W/m-3
> Density: 2700 kg.m-3,
> Heat Capacity: 1000 J/K becomes:
>
> Heat production in Kelvin per seconds per Kilogram:  (1e-6)/(2700*1000) =
> 3.7e-13 K/s/kg
>
> Then you multiply this by the scaling factor of radiogenic heat production
> (mass/length/time^3) to get the scaled value.
>
> Cheers
>
>
> Patrice
> On 26/01/2011, at 12:46 PM, Brian Wilson wrote:
>
> > Hello,
> >
> > I'm having some problems with the scaling in GALE, which is causing
> problems with convergence. The worst problem seems to be the scaling of
> crustal heat production. Since this quantity involves Watts, seconds^3
> appears in the denominator. Thus, scaling seconds up to millions of years
> creates huge numbers that are something like 10^60, even with a small offset
> from scaling kg up to a larger denomination. Has anyone else had this
> problem?
> >
> > Thanks,
> > Brian
> > _______________________________________________
> > CIG-LONG mailing list
> > CIG-LONG at geodynamics.org
> > http://geodynamics.org/cgi-bin/mailman/listinfo/cig-long
>
> Associate Professor Patrice F. Rey
> EarthByte Research Group
> School of Geosciences
> The University of Sydney
> +61 2 9351 2067
> patrice.rey at mac.com
> patrice.rey at sydney.edu.au
>
>
>
>
>
>
>
>
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