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<div class="">Hi Guillaume, </div>
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<div class="">I finally had a bit of time for running your files. </div>
<div class="">I’ve notice a problem at the level of the ‘InfiniteDomain’ definition.</div>
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<div class="">You should avoid having physical regions that overlap, I mean, it should be:</div>
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<div class="">// InfiniteDomain = Region[ INFINITE_DOMAIN ] ;</div>
<div class="">InfiniteDomainBottom = Region[ INFINITE_DOMAIN_BOTTOM ] ;</div>
<div class="">InfiniteDomainRight = Region[ INFINITE_DOMAIN_RIGHT ] ;</div>
<div class="">InfiniteDomainTop = Region[ INFINITE_DOMAIN_TOP ] ;</div>
<div class="">InfiniteDomainLeft = Region[ INFINITE_DOMAIN_LEFT ] ;</div>
<div class="">InfiniteDomain = Region[ {InfiniteDomainBottom, InfiniteDomainRight, InfiniteDomainTop,InfiniteDomainLeft} ] ;</div>
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<div class="">GetDP looks for the Physical numbers first and then it goes to the elements. </div>
<div class="">It could be then that it does not see that the parts are in fact the big region.</div>
<div class="">Doing just that, the result is different, correct? To check.</div>
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<div class="">Another possible source of a problem is the transformation to infinity that you apply in the region where you impose your particular boundary condition. Not sure that works either. </div>
<div class="">I would try first without that transformation. </div>
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<div class="">HTH, </div>
<div class="">Ruth</div>
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—<br class="">
Prof. Ruth V. Sabariego<br class="">
KU Leuven <br class="">
Dept. Electrical Engineering ESAT/Electa, EnergyVille<br class="">
<a href="http://www.esat.kuleuven.be/electa" class="">http://www.esat.kuleuven.be/electa</a></div>
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<blockquote type="cite" class="">
<div class="">On 6 Mar 2018, at 15:37, DILASSER Guillaume <<a href="mailto:Guillaume.DILASSER@cea.fr" class="">Guillaume.DILASSER@cea.fr</a>> wrote:</div>
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<div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">
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Dear GetDP users,<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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<span lang="EN-GB" class="">I am writing to ask for some help on how to use a<span class="Apple-converted-space"> </span><i class="">Formulation</i><span class="Apple-converted-space"> </span>term to enforce a constraint on the value of the unknown field on
the boundaries of a modelling domain.<o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span lang="EN-GB" class=""><o:p class=""> </o:p></span></div>
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<span lang="EN-GB" class="">The enclosed files provide an example of what I have been trying to do. I want simulate the response of a superconductor to an external field of the type<span class="Apple-converted-space"> </span><b class="">B</b>(t) = B<sub class="">1</sub>*f(t)*<b class="">u</b><sub class="">x</sub><span class="Apple-converted-space"> </span>+
B<sub class="">2</sub>*g(t)*<b class="">u</b><sub class="">y</sub>. The functions f and g are different which prevents me from using the usual<span class="Apple-converted-space"> </span><i class="">Constraint</i>block. Indeed, the use of the<span class="Apple-converted-space"> </span><i class="">TimeFunction</i><span class="Apple-converted-space"> </span>statement
would multiply the entire<span class="Apple-converted-space"> </span><b class="">B</b><span class="Apple-converted-space"> </span>expression, not allowing me to have two separate terms with different time variations.<o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span lang="EN-GB" class=""><o:p class=""> </o:p></span></div>
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<span lang="EN-GB" class="">Therefore, I have been trying to enforce my boundary condition through an additional term in the formulation, taking inspiration from the benchmarks dipole.pro and microstrip.pro. Despite my best efforts, I still have issues with
this approach :<o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt 38.25pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -18pt;" class="">
<span lang="EN-GB" style="font-family: Symbol;" class=""><span class="">·<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman";" class=""> <span class="Apple-converted-space"> </span></span></span></span><span lang="EN-GB" class="">The
field does not properly take the value that I ask for. I imagine this is because the unknowns on the boundary of the modelling domain are the nodal values of Phi (the scalar potential) and I am trying to constrain the values of h (in fact more of dh/dt). I
really cannot figure on my own how to constrain the values of Phi in the Formulation.<o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt 38.25pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -18pt;" class="">
<span lang="EN-GB" style="font-family: Symbol;" class=""><span class="">·<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman";" class=""> <span class="Apple-converted-space"> </span></span></span></span><span lang="EN-GB" class="">The
potential Phi seems to be floating despite the constraints that I set. I do not understand why and it seems to lead to the computation crashing early.<o:p class=""></o:p></span></div>
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<span lang="EN-GB" class=""><o:p class=""> </o:p></span></div>
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<span lang="EN-GB" class="">I would really appreciate if someone could advise me, I have spent quite some time on this issue but I really do not grasp what is wrong…<o:p class=""></o:p></span></div>
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<span lang="EN-GB" class=""><o:p class=""> </o:p></span></div>
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<span style="font-family: Tahoma, sans-serif; color: rgb(0, 0, 153);" class="">Guillaume DILASSER</span><span style="font-size: 10pt; font-family: Tahoma, sans-serif; color: rgb(0, 0, 153);" class=""><o:p class=""></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class="">Ingénieur de recherche / Research engineer<o:p class=""></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class=""><o:p class=""> </o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class="">CEA Saclay<o:p class=""></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class="">Bât.123 – P. 213c<o:p class=""></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class="">Point courrier n°11</span><span style="color: rgb(0, 0, 153);" class=""><o:p class=""></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class="">91191 Gif-sur-Yvette Cedex<o:p class=""></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class="">France</span><span style="color: rgb(0, 0, 153);" class=""><o:p class=""></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class=""><o:p class=""> </o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(0, 0, 153);" class=""><a href="mailto:guillaume.dilasser@cea.fr" style="color: rgb(149, 79, 114); text-decoration: underline;" class=""><span style="color: blue;" class="">guillaume.dilasser@cea.fr</span></a><o:p class=""></o:p></span></div>
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<o:p class=""> </o:p></div>
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