求助，comsol电磁场耦合实例流和电路耦合仿真问题，报DAE结构性错误

来源：蜘蛛抓取(WebSpider) 时间：2017-04-28 04:05 标签： comsol电磁场耦合实例
Intermittent bioirrigation and oxygen dynamics in permeable sedim...: Ingenta Connect
Volume 70,&Number 6
Authors: Volkenborn, N&Meile, C&Polerecky, L&Pilditch, Conrad A.;&Norkko, A&Norkko, J&Hewitt, Judi E.;&Thrush, Simon F.;&Wethey, David S.;&Woodin, Sarah A.
Source: , Volume 70,&Number 6, November 2012, pp. 794-823(30)Publisher:
To explore the dynamic nature of geochemical conditions in bioirrigated marine permeable sediments, we studied the hydraulic activity of three tellinacean bivalve molluscs (the Pacific species Macoma nasuta and Macomona liliana, and the northern Atlantic and Pacific species
Macoma balthica). We combined porewater pressure sensing, time-lapse photography and oxygen imaging to quantify the durations and frequencies of tellinid irrigation activity and the associated oxygen dynamics in the sediment. Porewater pressure records of all tellinids were dominated
by intermittent porewater pressurization, induced by periodic water injection into the sediment through their excurrent siphons, which resulted in intermittent oxygen supply to subsurface sediments. The irrigation (two–12 minutes long) and intervals between subsequent irrigation bouts
(1.5–13 minutes) varied among tellinid species and individual sizes. For large M. liliana and M. nasuta, the average intervals between irrigation bouts were sufficiently long (10 minutes and four minutes, respectively) to allow complete oxygen consumption in between irrigation
bouts in all tested sediment types. Irrigation patterns of smaller conspecifics and the smaller species M. balthica were characterized by significantly shorter separation of irrigation bouts, which resulted in more continuous oxygenation of the sediment. Transport-reaction modeling
confirmed these species- and size-specific geochemical signatures and indicated that the geochemical character of the sediment is largely conditioned by the interplay between temporal irrigation patterns and sedimentary oxygen consumption rates. For large tellinids, model simulations indicated
that oscillatory rather than stationary geochemical conditions are prevalent in a wide range of sediment types, with oxic pockets collapsing completely between periods of active irrigation. Based on the model results we developed analytical approximations that allow estimation of spatio-temporal
characteristics of sediment oxygenation for a wide range of sediment types and infaunal activity patterns. Our results emphasize the need to consider the intermittent nature of bioirrigation when studying the geochemical impact of infauna in permeable sediments.
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Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in.［求助］多物理场集成时出现错误_comsol吧_百度贴吧
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新手求助，怎么回事啊？
上海工商外国语职业学院针对三校生低分注册200名，
我也遇到了，怎么办呢！
应该是耦合变量传递不正确。
我也出现这个问题了，请问你解决了么？怎么解决的啊？
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求助，comsol电流(ec)和电路(cir)耦合仿真问题，报DAE结构性错误收藏
仿真的是三维电容极板在外电路下的电压电流变化，求解计算时报多场集成错误，DAE结构性不一致，现在想问问大家有没有碰到过这个问题，提供点意见或者建议，万分感谢。仿真的电路如下：c1、c2是 两个三维的圆形电极板模型，其余的都是外电路。
上海工商外国语职业学院针对三校生低分注册200名，
兄弟，请问你的问题解决了吗，我也有同样的问题
你可以在电压源的支路上串联一个小的电阻，比如100欧姆。然后耦合到有限元。我就是这么处理的
应该是你电路部分中的外部I vs U和U vs I与有限元中的集总边界不对应。 前者对应电流激励，后者对应电压激励。
这个通常是电路节点接错的问题
大神们 我也是这个错误 节点啥的对的 也加了电阻 还是错的
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