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Tangential component of gradient of scalar field at surface |
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March 23, 2007, 06:14 |
Hi,
To implement a thermo
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#1 |
Senior Member
Thomas Jung
Join Date: Mar 2009
Posts: 102
Rep Power: 17 |
Hi,
To implement a thermocapilllary convection boundary condition, I need the gradient of temperature tangential to the surface. I know how to get the temperature patchfield, and also the gradient normal to the surface, but how to get the tangential component? fvc::grad seems not to work on fvPatchFields, I tried this: const fvPatchField<scalar>& TB = lookupPatchField<volscalarfield,>("T"); const fvPatchField<vector> TGrad=fvc::grad(TB); results in: no matching function for call to 'grad(const Foam::fvPatchField<double>& I could declare and compute temperature gradient as a volfield all over the volume, but I thought this should only be my last ressort, in order to save memory. Thank you very much for any hint! Thomas |
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March 23, 2007, 07:58 |
Unfortunately, calculating the
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#2 |
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Eugene de Villiers
Join Date: Mar 2009
Posts: 725
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Unfortunately, calculating the volume gradient is the only out-of-the-box option. To calculate patch tangential gradients would require a finiteArea formulation, which is not currently integrated to the level that would make it simple to employ.
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June 4, 2013, 02:27 |
Any luck?
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#3 |
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Srivathsan N
Join Date: Jan 2013
Location: India
Posts: 101
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Hi Thomas,
Were you able to implement grad T tangentially? I'm also having a problem with that. Regards Srivaths |
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June 4, 2013, 02:51 |
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#4 |
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Ehsan
Join Date: Oct 2012
Location: Iran
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hi Srivathsan
Why do you need tangential component instead of normal one?
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June 4, 2013, 05:07 |
want grad T along a curved surface
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#5 |
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Srivathsan N
Join Date: Jan 2013
Location: India
Posts: 101
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Hi ehsan
I am also working on a similar problem as Thomas. I would like to have the gradient of temperature tangential to the surface for simulating thermo-capilary effect on a curved surface. |
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July 4, 2013, 07:13 |
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#6 | |
Senior Member
Srivathsan N
Join Date: Jan 2013
Location: India
Posts: 101
Rep Power: 13 |
Quote:
Is it possible to take the definition of fixedGradient boundary condition and map it along a patch (to get a gradient along the surface)? What does transformFvPatchField do? Does it help here? Thanks in advance.
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Regards, Srivaths |
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