how to treat the intersection point at the first and second kined bcs

[ztdep...@gmail.com]

Since the two kinds of bc has one common nodes. I want to know which one is impelented in idealii.

[Wells, David]

Hi there,

People use many different boundary conditions with deal.II - e.g., step-22 sets the normal component of the normal stress to zero, whereas many other tutorial programs use Dirichlet or Neumann boundary conditions.

Which two boundary conditions are you referring to?

Best,

David Wells

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From: dea...@googlegroups.com <dea...@googlegroups.com> on behalf of ztdep...@gmail.com <ztdep...@gmail.com>
Sent: Monday, November 13, 2023 12:48 AM
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Subject: [deal.II] how to treat the intersection point at the first and second kined bcs

 

Since the two kinds of bc has one common nodes. I want to know which one is impelented in idealii.

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[ztdepyahoo]

I mean one boundary has the first kind bc, while the second has neumann bc.  so What is the bc for the intersection nodes. 

	ztdepyahoo
ztdep...@gmail.com

---- Replied Message ----

From	ztdep...@gmail.com<ztdep...@gmail.com>
Date	11/13/2023 13:48

To	deal.II User Group<dea...@googlegroups.com>
Subject	[deal.II] how to treat the intersection point at the first and second kined bcs

Since the two kinds of bc has one common nodes. I want to know which one is impelented in idealii.

--

The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en
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[Daniel Arndt]

Dirichlet boundary conditions are normally enforced strongly while Neumann boundary conditions are enforced weakly.

Thus, when interpolating the Dirichlet boundary conditions on the respective boundary you would set the degrees of freedom accordingly

while the Neumann boundary conditions are part of the weak formulation.

Best,

Daniel

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