Korporaald's blog
https://imechanica.org/blog/10000081
enThe 2016 Rodney Hill Prize In Solid Mechanics
https://imechanica.org/node/18998
<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/179">solid mechanics</a></div><div class="field-item odd"><a href="/taxonomy/term/1788">applied mechanics</a></div><div class="field-item even"><a href="/taxonomy/term/1616">Rodney Hill Prize</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 class="MsoNormal"><span>It is with pleasure that Elsevier and the International Union of Theoretical and Applied Mechanics jointly announce the award of the <strong>2016 Rodney Hill Prize </strong>for contributions to the field of Solid Mechanics to <strong>Dr. Raymond Ogden </strong>of the University of Glasgow. </span><span>The prize will be presented to Dr. Ogden at the 2016 International Congress of Theoretical and Applied Mechanics to be held in Montreal, Canada. </span><span>This prize was founded by and is sponsored by Elsevier.</span></p>
<p class="MsoNormal"><span>Dr. Ogden currently holds the George Sinclair Chair of Mathematics in the School of Mathematics and Statistics of the University of Glasgow. He completed work toward a PhD degree in solid mechanics and applied mathematics at Cambridge University under the guidance of Professor Hill.</span></p>
<p><span> Throughout his distinguished career, Ogden has pioneered in the development of the continuum mechanics framework for the study of nonlinear material behavior and large deformation continuum mechanics. The constitutive law he proposed for rubber-like materials has been broadly adopted as a basis for numerical simulation. His 1984 book on <strong>Non-linear Elastic Deformations </strong>has become a classic in the field. Beginning with the constitutive description of rubber-like materials, now known as the Ogden model, he has developed constitutive descriptions of biological materials. In the past ten years, he has developed computational models of arterial walls that have been integrated into most commercial finite element codes. More recently, he has also pioneered in the development of constitutive descriptions for large amplitude deformation of soft materials that exhibit electromagnetic behavior.</span></p>
</div></div></div>Fri, 16 Oct 2015 12:06:28 +0000Korporaald18998 at https://imechanica.orghttps://imechanica.org/node/18998#commentshttps://imechanica.org/crss/node/18998Seventh International Conference on Engineering Failure Analysis - 3 - 6 July, 2016 - Abstract Submissions now open
https://imechanica.org/node/18730
<div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/74">conference</a></div></div></div><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/800">mechanical engineering</a></div><div class="field-item odd"><a href="/taxonomy/term/2509">Engineering Failure</a></div><div class="field-item even"><a href="/taxonomy/term/6992">Engineering Failure analysis</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><span>Engineering failure analysis is a key tool for the improvement of the modern innovation cycle now demands that component design involves a whole-of-life approach, incorporating an awareness of manufacture, safety, reliability, environmental sensitivity and disposal. This has focused attention on the pivotal role of failure analysis as an essential tool to improve equipment availability, help prevent accidents and disasters and to inform the processes of design, manufacture, operation and maintenance of key plant and equipment.</span></p>
<p><span>The strengths of past conferences have been the emphasis on practical application of technical knowledge to engineering failure analysis and the extensive use of case studies to the development of an understanding of engineering failures. The case study approach is strongly encouraged as an important mechanism for developing a body of knowledge well rooted in practical experience.</span></p>
<p><span>For more detailed information and to submit your abstract, please visit </span><span><span><a href="http://www.icefaconference.com/">http://www.icefaconference.com/</a></span></span></p>
</div></div></div>Tue, 18 Aug 2015 12:28:34 +0000Korporaald18730 at https://imechanica.orghttps://imechanica.org/node/18730#commentshttps://imechanica.org/crss/node/18730Yield stress fluid flows
https://imechanica.org/node/17467
<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/4117">Yield stress</a></div><div class="field-item odd"><a href="/taxonomy/term/4172">Fluid flow</a></div><div class="field-item even"><a href="/taxonomy/term/608">research</a></div><div class="field-item odd"><a href="/taxonomy/term/1636">experiments</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>A Virtual Special Issue of the <a href="http://www.journals.elsevier.com/journal-of-non-newtonian-fluid-mechanics/"><em>Journal of Non-Newtonian Fluid Mechanics </em></a>devoted to <strong>yield stress fluid flows</strong> has just been released. With this first Virtual Special Issue of the journal we inaugurate a practice, which we plan to make regular, of highlighting developments on a particular subject of relevance in order to guide and encourage research in the field. Each virtual special issue will be built around a recent invited review paper by a leading expert and consist of links to recent, and some not-so-recent, JNNFM papers in the field of the review. These papers, which we select with advice from the author of the review, will showcase a wide range of high-quality contributions to illustrate the wealth and vigor of the topic.</p>
<p>We are delighted that <strong><a href="http://www.sciencedirect.com/science/article/pii/S0377025714000895"><span><span>Philippe Coussot</span></span></a></strong> was willing to write the first review article in this new series, on the topic of experimental studies of yield stress fluids. We have chosen 15 papers to complement this review, beginning with the experimental work of <strong><a href="http://www.sciencedirect.com/science/article/pii/S0377025712002248"><span><span>Jossic et al</span></span></a>.</strong> (2013). This study of creeping flow around a perpendicular disc, is a good illustration of the interesting flow physics that remain to be investigated with complex fluids in classical flows. The next several papers address the technologically-important topic of two-phase flows of yield-stress fluids: the experiments of <a href="http://www.sciencedirect.com/science/article/pii/S0377025708002140"><span><span>Sikorski et al</span></span></a>. (2009) on bubbles rising on yield stress fluids, the interesting and original experiments on droplets of yield stress fluids by <a href="http://www.sciencedirect.com/science/article/pii/S0377025710001096"><strong><span><span>German and Bertola</span></span></strong></a> (2010) and finally a theoretical analysis of droplet formation, together with some experiments, by <a href="http://www.sciencedirect.com/science/article/pii/S0377025710001618"><span><span>Balmforth et al.</span></span></a> (2010). <a href="http://www.sciencedirect.com/science/article/pii/S0377025711002412"><strong><span><span>Taghavi et al</span></span></strong></a>. (2012) is next, experimentally characterizing fluid displacement of a buoyant miscible yield stress fluid by a denser Newtonian fluid, a very important problem in drilling.</p>
<p>While the opening review paper deals only with laminar flows, yield stress fluid flows are also important under transitional and turbulent flow conditions, as in the pipe flow experiments of <a href="http://www.sciencedirect.com/science/article/pii/S0377025705000704"><strong><span><span>Peixinho et al.</span></span></strong></a> (2005), another case of relevance to drilling. We close the showcase of experiments with the contribution of <a href="http://www.sciencedirect.com/science/article/pii/S0377025711001182"><strong><span><span>Rensing et al</span></span></strong></a>. (2011) on ice slurries in water-in-oil emulsions showing that yield stress fluids can be found with unusual combinations of components.</p>
<p>Numerical investigations of yield stress fluid flows are increasingly useful and popular. The numerical methods have to deal with the yield condition and there are two approaches to doing so: regularization facilitates the governing equations by introducing a high viscosity fluid at low shear rates, thus transforming the yield stress material into a fluid, but it is an approximation and the location of the yield surface becomes ill-defined. This is well shown by <a href="http://www.sciencedirect.com/science/article/pii/S0377025706002898"><span><span>Mitsoulis </span></span></a>(2007) in his work on extrudate swell, a very relevant problem for polymer processing. Lagrangian tracking methods explicitly compute the yield surface and do not approximate the material as a fluid, but are computationally more complex. This is illustrated by <a href="http://www.sciencedirect.com/science/article/pii/S0377025705000911"><strong><span><span>Huilgol and You</span></span></strong></a> (2005) in their application to pipe flow of various yield stress fluid models. The last paper in this section, by <a href="http://www.sciencedirect.com/science/article/pii/S0377025712002315"><span><span>Dimakopoulos et al</span></span></a>. (2013), compares both approaches in their numerical computations of steady bubble rise in a yield stress fluid.</p>
<p>To illustrate the diversity of applications where yield stress fluids are of relevance three works were selected. Two-phase flows with a solid phase are here represented by the computations of<a href="http://www.sciencedirect.com/science/article/pii/S0377025703001113"><span><span> Liu et al</span></span></a>. (2003) on the interactions between moving rigid spheres in a Bingham material. The restart of pipeline flows of waxy crude oils by <a href="http://www.sciencedirect.com/science/article/pii/S0377025706000711"><strong><span><span>Vinay et al</span></span></strong></a>. (2006) is relevant for flow assurance in the oil industry and the detailed investigation of <a href="http://www.sciencedirect.com/science/article/pii/S0377025710001357"><strong><span><span>Turan et al</span></span></strong></a>. (2010) on free convection of Bingham fluids in a 2D square enclosure with differentially heated walls presents useful heat transfer correlations.</p>
<p>Analytical approaches to a problem provide the most complete and elegant picture of its solution, if it exists. A good example is the analysis of the squeeze flow of a cylindrical sample of a yield stress paste between parallel plates by <a href="http://www.sciencedirect.com/science/article/pii/S0377025705000959"><span><span>Sherwood </span></span></a>(2002). Last, but not least, the modeling of yield stress fluids can be actually rather complex because the yield stress is often combined with such characteristics as thixotropy. The development of adequate rheological constitutive equations for such materials is well shown by <strong><a href="http://www.sciencedirect.com/science/article/pii/S0377025709001578"><span><span>Souza Mendes</span></span></a></strong> (2009).</p>
<p>We hope you enjoy reading or revisiting these contributions and that doing so will lead to new research ideas and insights. Several further invited reviews and their corresponding virtual special issues are in progress and we look forward to presenting these in the near future.</p>
<p><em>Editors of the Journal of Non-Newtonian Fluid Mechanics<br /></em>Fernando Pinho, University of Porto, Portugal<br />Mike Graham, University of Wisconsin-Madison, USA</p>
<p><em>Executive Publisher, Elsevier<br /></em>Keith Lambert</p>
</div></div></div>Fri, 07 Nov 2014 11:02:21 +0000Korporaald17467 at https://imechanica.orghttps://imechanica.org/node/17467#commentshttps://imechanica.org/crss/node/17467