iMechanica - newtonian
https://imechanica.org/taxonomy/term/5650
enValidation and benchmarking problems for 3D fluid simulation with free boundaries
https://imechanica.org/node/9078
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>
I have a hard time finding problem sets for validation and<br />
benchmarking of methods and codes for 3d fluid simulation with free<br />
boundaries. Please guide me to (standardized) problem sets or key<br />
litterture that is a suitable starting point. If there are not many<br />
standardized tests I would like to initiate a dsicussion about what a<br />
good test collection should be. I understand that iMechanica is focused<br />
more on solid mechanics than fluid dynamics but the overlap is big.
</p>
<p>
The best collection I have found so far is the one from SPHERIC (<a href="http://wiki.manchester.ac.uk/spheric/index.php/SPHERIC_Home_Page" title="http://wiki.manchester.ac.uk/spheric/index.php/SPHERIC_Home_Page">http://wiki.manchester.ac.uk/spheric/index.php/SPHERIC_Home_Page</a>) but there should be more. Meeting the 2D benchmark tests is not a guarantee that a 3D code is working properly
</p>
<p>
I am missing standardized tests - with established experimental results and/or exact solutions - on
</p>
<ul><li>3D objects (sphere, wedge, cone etc) entering fluid surface </li>
<li>3D fluid interacting with flexible solid or jointed rigid bodies </li>
<li>wave scattering on static and dynamic objetcs</li>
<li>time evolution of large amplitude waves </li>
<li>surface wake fields of standard geometries - static and dynamic (standardized ship geoemtry)
</li>
<li>transients and instabilities of varios 3D flows with free surfaces (shear flow, vortices etc)
</li>
<li>special tests for high viscosity, viscoplasticity, non-newtonian fluids in 3D and with free boundaries</li>
</ul><p>
I am currently collecting litterature on such tests but I can't help<br />
thinking that problem sets should already be compiled somewhere "out<br />
there". Is it that free surfaces is a too difficult problem (or model<br />
dependent) and all methods and software are bound not to agree with<br />
experiments? Well, we need the tests to ever resolve this. Thera is an<br />
ever increasing number of approaches for these systems - meshfree and<br />
mesh based - and it is impossible to judge what approach to use on which<br />
type of problem and what artefacts to watch out for.
</p>
<p>
P.S. Sorry for double posting. I was not sure wether to post as a blog entry or directed to a forum.
</p>
</div></div></div><div class="field field-name-taxonomy-forums field-type-taxonomy-term-reference field-label-above"><div class="field-label">Forums: </div><div class="field-items"><div class="field-item even"><a href="/forum/440">Fluid Mechanics Forum</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-above"><div class="field-label">Free Tags: </div><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/859">Navier-Stokes</a></div><div class="field-item odd"><a href="/taxonomy/term/1088">3D</a></div><div class="field-item even"><a href="/taxonomy/term/1281">experiment</a></div><div class="field-item odd"><a href="/taxonomy/term/1556">validation</a></div><div class="field-item even"><a href="/taxonomy/term/2646">Fluid</a></div><div class="field-item odd"><a href="/taxonomy/term/3473">viscoplastic</a></div><div class="field-item even"><a href="/taxonomy/term/4717">viscous</a></div><div class="field-item odd"><a href="/taxonomy/term/5648">benchmark</a></div><div class="field-item even"><a href="/taxonomy/term/5649">comparison</a></div><div class="field-item odd"><a href="/taxonomy/term/5650">newtonian</a></div><div class="field-item even"><a href="/taxonomy/term/5651">non-newtonian</a></div></div></div>Mon, 11 Oct 2010 13:21:49 +0000martinservin9078 at https://imechanica.orghttps://imechanica.org/node/9078#commentshttps://imechanica.org/crss/node/9078Validation and benchmarking problems for 3D fluid simulation with free boundaries
https://imechanica.org/node/9076
<div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/859">Navier-Stokes</a></div><div class="field-item odd"><a href="/taxonomy/term/1088">3D</a></div><div class="field-item even"><a href="/taxonomy/term/1281">experiment</a></div><div class="field-item odd"><a href="/taxonomy/term/1556">validation</a></div><div class="field-item even"><a href="/taxonomy/term/2646">Fluid</a></div><div class="field-item odd"><a href="/taxonomy/term/3473">viscoplastic</a></div><div class="field-item even"><a href="/taxonomy/term/4717">viscous</a></div><div class="field-item odd"><a href="/taxonomy/term/5648">benchmark</a></div><div class="field-item even"><a href="/taxonomy/term/5649">comparison</a></div><div class="field-item odd"><a href="/taxonomy/term/5650">newtonian</a></div><div class="field-item even"><a href="/taxonomy/term/5651">non-newtonian</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>I have a hard time finding problem sets for validation and benchmarking of methods and codes for 3d fluid simulation with free boundaries. Please guide me to (standardized) problem sets or key litterture that is a suitable starting point. If there are not many standardized tests I would like to initiate a dsicussion about what a good test collection should be. I understand that iMechanica is focused more on solid mechanics than fluid dynamics but the overlap is big. </p>
<p>
The best collection I have found so far is the one from SPHERIC (<a href="http://wiki.manchester.ac.uk/spheric/index.php/SPHERIC_Home_Page">http://wiki.manchester.ac.uk/spheric/index.php/SPHERIC_Home_Page</a>) but there should be more. Meeting the 2D benchmark tests is not a guarantee that a 3D code is working properly
</p>
<p>
I am missing standardized tests - with established experimental results and/or exact solutions - on
</p>
<ul><li>3D objects (sphere, wedge, cone etc) entering fluid surface </li>
<li>3D fluid interacting with flexible solid or jointed rigid bodies </li>
<li>wave scattering on static and dynamic objetcs</li>
<li>time evolution of large amplitude waves </li>
<li>surface wake fields of standard geometries - static and dynamic (standardized ship geoemtry)
</li>
<li>transients and instabilities of varios 3D flows with free surfaces (shear flow, vortices etc)
</li>
<li>special tests for high viscosity, viscoplasticity, non-newtonian fluids in 3D and with free boundaries</li>
</ul><p>I am currently collecting litterature on such tests but I can't help thinking that problem sets should already be compiled somewhere "out there". Is it that free surfaces is a too difficult problem (or model dependent) and all methods and software are bound not to agree with experiments? Well, we need the tests to ever resolve this. Thera is an ever increasing number of approaches for these systems - meshfree and mesh based - and it is impossible to judge what approach to use on which type of problem and what artefacts to watch out for.</p>
</div></div></div>Mon, 11 Oct 2010 13:14:55 +0000martinservin9076 at https://imechanica.orghttps://imechanica.org/node/9076#commentshttps://imechanica.org/crss/node/9076