iMechanica - engineering thermodynamics
https://imechanica.org/taxonomy/term/5900
enThermodynamics 2.0
https://imechanica.org/node/23964
<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/4568">Applied Physics</a></div><div class="field-item odd"><a href="/taxonomy/term/1253">Chemistry</a></div><div class="field-item even"><a href="/taxonomy/term/2545">biology</a></div><div class="field-item odd"><a href="/taxonomy/term/989">mathematics</a></div><div class="field-item even"><a href="/taxonomy/term/5900">engineering thermodynamics</a></div><div class="field-item odd"><a href="/taxonomy/term/1055">entropy</a></div><div class="field-item even"><a href="/taxonomy/term/12753">social sciences</a></div><div class="field-item odd"><a href="/taxonomy/term/10854">natural sciences</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>If you ever wanted to attend a conference where Natural Sciences meet Social Sciences. You may want to consider attending,</span></p>
<p>International Conference on Thermodynamics 2.0
</p><p>June 22-24, 2020 | Massachusetts, USA</p>
<p><a href="http://iaisae.org/index.php/speakers/">http://iaisae.org/index.php/speakers/</a></p>
</div></div></div>Mon, 03 Feb 2020 15:45:54 +0000Cemal Basaran23964 at https://imechanica.orghttps://imechanica.org/node/23964#commentshttps://imechanica.org/crss/node/23964Unified Mechanics Theory
https://imechanica.org/node/23917
<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/76">research</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/9297">Advances in Mechanics</a></div><div class="field-item odd"><a href="/taxonomy/term/11609">#Plasticity</a></div><div class="field-item even"><a href="/taxonomy/term/4568">Applied Physics</a></div><div class="field-item odd"><a href="/taxonomy/term/5900">engineering thermodynamics</a></div><div class="field-item even"><a href="/taxonomy/term/12739">contact mechanics; adhesion; friction; tribology</a></div><div class="field-item odd"><a href="/taxonomy/term/4757">CDM continuum damage mechanics</a></div><div class="field-item even"><a href="/taxonomy/term/1502">Computational Fracture Mechanics</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>Recently, I guest-edited a special issue of the journal Entropy on Unified Mechanics Theory and related topics. All published papers are available for free download from the link below.</span></p>
<p><a href="https://www.mdpi.com/journal/entropy/special_issues/fatigue">https://www.mdpi.com/journal/entropy/special_issues/fatigue</a></p>
<p> </p>
</div></div></div>Tue, 21 Jan 2020 18:09:19 +0000Cemal Basaran23917 at https://imechanica.orghttps://imechanica.org/node/23917#commentshttps://imechanica.org/crss/node/23917Two PhD positions in computational mechanics of materials at the University of Tennessee
https://imechanica.org/node/20267
<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/73">job</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/1040">Crystal plasticity</a></div><div class="field-item odd"><a href="/taxonomy/term/5900">engineering thermodynamics</a></div><div class="field-item even"><a href="/taxonomy/term/934">Composites</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>Two PhD positions are currently available in the Computational Laboratory for the Mechanics of Interfaces at the University of Tennessee - Knoxville (</span><a title="http://clmi.utk.edu" href="http://clmi.utk.edu/" target="_blank"><strong><span>http://clmi.utk.edu</span></strong></a><span>). Research topics are in the following areas:</span></p>
<p><span>1. Modeling of titanium alloys using dislocation density based crystal plasticity finite element method.</span></p>
<p><span>2. Thermo-mechanical modeling of damage in fiber-reinforced composite materials using mixture theory.</span></p>
<p><span>Candidates should possess a master's degree in civil, mechanical, or other related engineering field at the time of enrollment at UTK. A strong background in continuum mechanics, finite element modeling, nonlinear constitutive modeling, and/or computer programming in MATLAB and FORTRAN is desired.</span></p>
<p><span>If interested, contact Dr. Truster directly at<span class="apple-converted-space"> </span></span><a title="ttruster@utk.edu" href="mailto:ttruster@utk.edu" target="_blank"><strong><span>ttruster@utk.edu</span></strong></a><span>. Please include your CV along with a brief description of prior research experiences and how your interests align with the research conducted at CLMI. In your CV, include: GPA, GRE test scores, and publication list.</span></p>
</div></div></div>Wed, 07 Sep 2016 03:14:13 +0000Timothy Truster20267 at https://imechanica.orghttps://imechanica.org/node/20267#commentshttps://imechanica.org/crss/node/20267"THERMO Spoken Here!" - Basic Engineering Thermo OnLine
https://imechanica.org/node/13929
<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/128">education</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/5900">engineering thermodynamics</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>
Basic Engineering Thermodynamics content is online:
</p>
<p>
<a href="http://www.thermospokenhere.com">http://www.thermospokenhere.com</a>
</p>
<p>
Over 200 sequential examples and topics. The material includes essential
</p>
<p>
prerequisite physics and calculus. Coverage of Engineering Thermo amounts to
</p>
<p>
about 30% of the typical, current ME Department offering. Less is More!
</p>
</div></div></div>Thu, 20 Dec 2012 20:16:35 +0000jamespohl13929 at https://imechanica.orghttps://imechanica.org/node/13929#commentshttps://imechanica.org/crss/node/13929Calculating the activity coefficient of aluminium in the solid state as well as in the liquid state.
https://imechanica.org/node/10950
<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/76">research</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/5900">engineering thermodynamics</a></div><div class="field-item odd"><a href="/taxonomy/term/6545">Physical metallurgy of metals</a></div><div class="field-item even"><a href="/taxonomy/term/6546">oxidation</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>
</p>
<p>
I am trying to calculate the activity of aluminium in the liquid state or solid state. The bottom line is that I want to know if Aluminium during oxidation is more active in the liquid state than in solid state.If so, how can I prove it.
</p>
</div></div></div>Sun, 21 Aug 2011 22:57:53 +0000John A. Smith10950 at https://imechanica.orghttps://imechanica.org/node/10950#commentshttps://imechanica.org/crss/node/10950How to teach thermodynamics
https://imechanica.org/node/9588
<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/180">thermodynamics</a></div><div class="field-item odd"><a href="/taxonomy/term/5900">engineering thermodynamics</a></div><div class="field-item even"><a href="/taxonomy/term/5901">chemical thermodynamics</a></div><div class="field-item odd"><a href="/taxonomy/term/5902">bioengineering thermodynamics</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>This blog will give some wisdom guidance on how to teach <a href="http://www.eoht.info/page/Thermodynamics">thermodynamics</a>, particularly in the opening weeks, to undergraduate engineering students. This blog started as a response post to nanomechanics engineer Zhigang Suo's <a href="node/9501#comment-16054">19 Dec 2010 request</a> for suggestive advice on which textbook to use and how to teach thermodynamics, as he is apprehensive about teaching his first thermodynamics class (</span>Engineering Science 181 Engineering Thermodynamics, Harvard<span>). In any event, to give some quick advice on how to teach thermodynamics:</span>
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<img src="http://image.wetpaint.com/image/1/9iFkjXkWf670TzdDZUWSQw57880" alt=" " width="300" height="300" align="left" />
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<span>(a) Show students the <a href="http://www.eoht.info/page/Timeline+of+thermodynamics">visual timeline</a> of how thermodynamics originated, namely how <a href="http://www.eoht.info/page/Parmenides">Parmenides</a>’ 485 BC <a href="http://www.eoht.info/page/nature+abhors+a+vacuum">denial of the void</a>, led to the development of the <a href="http://www.eoht.info/page/barometer">barometer</a> (1643), the Guericke <a href="http://www.eoht.info/page/Guericke+engine">vacuum engine</a> (1652), the <a href="http://www.eoht.info/page/gas+laws">gas laws</a> (1658), the Papin digester (1679), then to the <a href="http://www.eoht.info/page/Papin+engine">Papin engine</a> (1690); which is the prototype engine model for the <a href="http://www.eoht.info/page/Carnot+cycle">Carnot cycle</a> (as described in steps by Papin), and hence the original model for the <a href="http://www.eoht.info/page/Thermodynamic+system">thermodynamic system</a>, i.e. the volume of whatever substance is inside the <a href="http://www.eoht.info/page/piston%20and%20cylinder">piston and cylinder</a>. It is important to understand the relation between the creation of the <a href="http://www.eoht.info/page/vacuum">vacuum</a> and work; and to get a visual of what exactly is the "<a href="http://www.eoht.info/page/Working+substance">working substance</a>" (thermodynamic system), as defined in the Papin engine model. </span>
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<span>(b) Introduce students to <a href="http://www.eoht.info/page/Boerhaave%27s+law">Boerhaave’s law</a> (1720), i.e. that all bodies of the universe can be made to expand or contract in volume; this is the opening citation to Lavoisier’s <a href="http://www.eoht.info/page/Caloric+theory">caloric theory</a>, based on experiments using Papin's digester. This is very important to the understanding of entropy.</span>
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<span>(c) Then introduce student's to <a href="http://www.eoht.info/page/Roger+Boscovich">Roger Boscovich</a>'s 1758 stationary point atom model of gases (one in a long line of <a href="http://www.eoht.info/page/Atomic+theory">atomic theories</a>), in which the atoms of the gas were thought to oscillate about points of equilibrium, rather than to move about in trajectories; this view seems to be the model that scientists, in particular Lavoisier and Carnot, had in mind, prior to <a href="http://www.eoht.info/page/August+Kronig">August Kronig</a>'s 1856 paper on "A General Theory of Gases", and Clausius' 1857 followup paper "<a href="http://www.eoht.info/page/On+the+Nature+of+the+Motion+which+we+call+Heat">On the Nature of the Motion which we Call Heat</a>", which launched the <a href="http://www.eoht.info/page/Kinetic+theory">kinetic theory</a> of gases (and hence statistical mechanics). As Kronig put it: "the molecules of a gas do not oscillate about definite positions of equilibrium, but instead move about with velocity." Lavoiser speaks of caloric particles as something that is accumulated in the intersticies of the regions between the atoms of gas; thus both he and Carnot (who adopted Lavoisier's theory) seem to have had a Boscovich-type model in mind when they were of the view that all physical bodies expand and contract to their original atomic configuration, based on the number of caloric particles in them, the caloric amount remaining unchanged (as described by Carnot as the <a href="http://www.eoht.info/page/Re-establishment+of+equilibrium+in+the+caloric">re-establishment in the equilibrium in the caloric</a>), per each engine cycle. This is very important to the inderstanding of the difference between a "reversible" cycle and "<a href="http://www.eoht.info/page/Irreversibility">irreversible</a>" cycle or process; and hence to the underlying understanding of the second law and entropy increase.</span>
</p>
<p><span>(d) Then introduce students to Gustave Coriolis’ <a href="http://www.eoht.info/page/Principle+of+the+transmission+of+work">principle of the transmission of work</a>, as derived in his 1829 <a href="http://www.eoht.info/page/Calculation+of+the+Effect+of+Machines"><em>Calculation of the Effect of Machines</em></a>; there's no English translation (you have to do your own French to English translation to read the derivation), but this is where most of the geometry behind Clausius' derivation of internal energy stems, and is the origin of the mathematical definition of work. </span></p>
<p>
<span>(e) Then introduce students to the <a href="http://www.eoht.info/page/Mechanical+equivalent+of+heat">mechanical equivalent of heat</a> (1842); this is also a difficult concept to understand, but it was through this model that "caloric" became converted into "entropy"; and beyond this the entire unit system of energy (joule) is based on this measurement. The true name of entropy is called "<a href="http://www.eoht.info/page/Transformational+content">transformation content</a>", as explained in great detail by Clausius, and it is based on this model that heat and work are equivalent or transformable into each other, and hence caloric is not indestructible as Lavoisier and Carnot viewed things. </span>
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<p class="MsoNormal">
<span>(f) Then I would <em>strongly</em> suggest the required reading assignment of the first 38-pages (mathematical introduction + first law derivation) of Rudolf Clausius’ <a href="http://www.amazon.com/Mechanical-Theory-Heat-W-R-Browne/dp/1147113750/ref=sr_1_4?s=books&ie=UTF8&qid=1294314134&sr=1-4"><em>The Mechanical Theory of Heat</em></a>, the 1879 2nd edition translation by Walter Browne (~$20 new at Amazon). All engineering thermodynamics textbooks are simply a rehashing of this 1879 textbook, which is the core of all of thermodynamics. This textbook should be a required purchase for all engineers. As Einstein put it, of all the books in science, the theory contained in Clausius' textbook is the least likely, of all universal theories, to ever be overthrown. </span>
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<span>All of this should be introduced in the first week or so of class, then you can go on to fill in the rest of the class with whatever engineering textbook you choose. Students looking for a fuller or deeper understanding of entropy can then go back later and read the key chapters of Clausius' textbook (3, 4, 5, 9, 10), on his or her own time. The math of thermodynamics is certainly difficult, but more often than not it is the intuitive basis that is the more difficult aspect of why one is learning the math and doing the derivations. Introduction to this foundation may help with this. </span>
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</div></div></div>Thu, 06 Jan 2011 14:32:44 +0000Libb Thims9588 at https://imechanica.orghttps://imechanica.org/node/9588#commentshttps://imechanica.org/crss/node/9588