tag:blogger.com,1999:blog-36194190.post463091068024727427..comments2024-03-29T02:16:43.873-05:00Comments on It's the Rheo Thing: Pushing a model too farJohnhttp://www.blogger.com/profile/04412324900423436763noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-36194190.post-3651719548396601022010-06-29T13:21:06.036-05:002010-06-29T13:21:06.036-05:00"Viscosity, in contrast, need the concept of ...<i>"Viscosity, in contrast, need the concept of friction to be "defined", although it can "calculated" by dividing stress with strain rate."</i><br /><br />I'd take the rheological viewpoint that the storage and loss moduli are more fundamental properties. From these quantities, you can get the viscosity. You cannot run that calculation in reverse.Johnhttps://www.blogger.com/profile/04412324900423436763noreply@blogger.comtag:blogger.com,1999:blog-36194190.post-52015438914962712582010-06-29T11:47:15.450-05:002010-06-29T11:47:15.450-05:00This is not a cycle. Friction does not need the co...This is not a cycle. Friction does not need the concept of viscosity to be defined. Dissipation does not need the concepts of friction or viscosity to be defined, either, although dissipation may happen in friction.<br /><br />Viscosity, in contrast, need the concept of friction to be "defined", although it can "calculated" by dividing stress with strain rate.孙尉翔http://xiangge.andrewsun.netnoreply@blogger.comtag:blogger.com,1999:blog-36194190.post-20043688014453204192010-06-25T23:04:31.601-05:002010-06-25T23:04:31.601-05:00Well, it is part of the great viscosity-friction-d...Well, it is part of the great viscosity-friction-dissipation cycle. Any definition of one tends to include a hand-waving variable given one of the other two names.Materialisthttps://www.blogger.com/profile/17212265123565984739noreply@blogger.com