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<div dir="auto">Yes, that is my understanding.
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<div dir="auto">We do some “2.5D” rotating simulations in 2D cylindrical geometry and use the AXISYMMETRIC boundary condition for this very reason.</div>
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<div dir="auto">Sean</div>
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<div class="matchFont">----------------------------------------------------------------------
<div>Sean M. Couch, Ph.D.</div>
<div>Assistant Professor</div>
<div>Department of Physics and Astronomy</div>
<div>Department of Computational Mathematics, Science, and Engineering</div>
<div>Facility for Rare Isotope Beams</div>
<div>Michigan State University</div>
<div>567 Wilson Rd, 3250 BPS</div>
<div>East Lansing, MI 48824</div>
<div>(517) 884-5035 --- couch@pa.msu.edu --- www.pa.msu.edu/~couch</div>
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<div name="messageReplySection">On Jul 24, 2019, 1:25 PM -0400, Alex Robinson - UKRI STFC <alex.robinson@stfc.ac.uk>, wrote:<br>
<blockquote type="cite" class="spark_quote" style="margin: 5px 5px; padding-left: 10px; border-left: thin solid #1abc9c;">
Hello Guys,<br>
Thanks for this. So since VELZ should correspond to the azimuthal velocity (v_phi as it were), I also need to ensure that the azimuthal velocity is zero (which will be true in my case) to ensure equivalence between ‘reflect’ and ‘axisymmetric’?<br>
<br>
Thanks,<br>
Alex<br>
<br>
Dr. A.P.L. Robinson,<br>
Plasma Physics Group Leader,<br>
Central Laser Facility<br>
STFC Rutherford-Appleton Laboratory<br>
Tel. : 01235 77 8368<br>
<br>
<br>
From: "Sean M. Couch" <couch@pa.msu.edu><br>
Date: Wednesday, 24 July 2019 at 16:33<br>
To: "Robinson, Alex (STFC,RAL,CLF)" <alex.robinson@stfc.ac.uk>, Klaus Weide <klaus@flash.uchicago.edu><br>
Cc: flash-users <flash-users@flash.uchicago.edu><br>
Subject: Re: [FLASH-USERS] Implementing Jet via<br>
<br>
Correct me if I’m wrong but I’m not sure that’s 100% correct, Klaus. Even without b-field variables (i.e., pure Hydro) AXISYMMETRIC boundary conditions will flip the sign of VELZ, treating as though it is the rotational velocity for a “2.5D” simulation.<br>
<br>
Sean<br>
<br>
----------------------------------------------------------------------<br>
Sean M. Couch, Ph.D.<br>
Assistant Professor<br>
Department of Physics and Astronomy<br>
Department of Computational Mathematics, Science, and Engineering<br>
Facility for Rare Isotope Beams<br>
Michigan State University<br>
567 Wilson Rd, 3250 BPS<br>
East Lansing, MI 48824<br>
(517) 884-5035 --- couch@pa.msu.edu --- www.pa.msu.edu/~couch<br>
On Jul 24, 2019, 11:22 AM -0400, Klaus Weide <klaus@flash.uchicago.edu>, wrote:<br>
<br>
On Wed, 24 Jul 2019, Alex Robinson - UKRI STFC wrote:<br>
<br>
<br>
*In a pure hydrodynamic simulation is there any real difference between<br>
reflect and axisymmetric on xl? Can I do what I want to do (given there<br>
are no b-fields) with ‘reflect’ alone?<br>
<br>
I did not follow the details of the previous exchange, but want to confirm<br>
that you are correct on this point: In the absense of magnetic field<br>
variables, 'axisymmetic' and 'reflect(ing)' boundary conditions are meant<br>
to be completely equivalent.<br>
<br>
Klaus<br>
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