热流固耦合理论和相应的实例
有许多网友会涉及到用ADINA解决热流固耦合的问题，上传一下自己看到的一篇认为不错的热流固耦合的理论说明和不错的训练例子，供大家参考2 楼主太感谢了 这是管道和湍流的模型文件 热流固耦合理论 热流固耦合理论 这个太好了，谢谢楼主！ 谢谢楼主啊 该版人气不是很旺啊，感谢楼主最近提供这么多的好资料！ 这个好啊，学习学习 这就需要你们多提问题的同时，也积极帮别人解决问题( ⊙ o ⊙ )啊！ 7# yfh1984 学习学习，正缺少这方面的资料 http://www.adina.com/ring.gifBenchmarking Thermal FSI Capabilities In an earlier News we focused on the benchmarking of fluid-structure interaction finite element procedures assuming that there are no temperature effects, see also the reference given below. Of course, there are many problems where changing temperature conditions must be included in the analysis. The temperature may vary spatially over the problem domain and may change as a function of time. The problem domain considered here is the solid/structure fully coupled with the fluid. The temperature changes may then significantly affect the analysis results, including the deformations and stresses in the structure. ADINA is a particularly powerful tool for the analysis of such problems (see e.g. News). A simulation may include [*]The solid and structure modeled assuming small or large deformations, including temperature effects and contact
[*]The fluid modeled as a Navier-Stokes fluid including temperature effects (Newtonian or non-Newtonian flow)
[*]Steady-state or transient conditions
[*]Fully coupled conditions between the fluid and the solid or structure (of course, one-way coupling can also be assumed)
[*]Conduction, convection, temperature dependent material properties, heat generation due to plasticity or frictionWe illustrate some of these features in two simple but insightful problem solutions, where fully coupled conditions are modeled.
Problem 1 The problem in the figure below shows a rubber ring (Ogden material model) subjected to a temperature gradient and internal fluid pressure. The ring expands from an outer radius of 2 to a radius of 8.72, clearly undergoing very large deformations. In this simulation, the fluid mesh moves with the rubber ring expansion, in order to span over the increasingly larger fluid domain. The above movie shows the response of the ring and the fluid. http://www.adina.com/ring1.gif
Schematic of Problem 1 http://www.adina.com/ring_mesh.gif
Meshes Used in Problem 1
Problem 2 In the second problem, we consider a plate subjected to tangential fluid flow. The plate is fixed at its ends, and the temperature of the fluid increases leading to thermal induced buckling. The plate is modeled using a thermoplastic material with temperature dependent yield stress and coefficient of thermal expansion. The figures below show the problem, the finite element mesh used, and some solution results. http://www.adina.com/plate1.gif
Schematic of Problem 2
http://www.adina.com/plate_mesh.gif
Meshes Used in Problem 2
http://www.adina.com/plate_result.gif
Results of Problem 2: Temperature and Velocity Plots
The results assuming an isotropic elastic material, uniform temperature rise, and very small fluid pressure can be compared with an analytical solution based on beam theory. This comparison is given in the last figure showing the vertical displacement at the middle of the plate (normalized by the length of the plate) versus the applied temperature. The buckling load and the post buckling displacement, both, agree with the analytical solution.
http://www.adina.com/plate_comparison.gif
Comparison of Results of Simplified Problem 2 with an Analytical Solution
It is clear that the ADINA FSI capabilities including temperature effects can be very useful in the simulation of many problems arising in various industries. For more information on ADINA FSI, please refer to our page on fluid-structure interaction. 先下来学习学习，好贴必顶！ 谢谢楼主。
现在准备做流固方面的东西。 感谢楼主，也学习下 版主： 您好！ 我有一些问题想请教您， 但是论坛交流滞后太严重，换个能即时交流的方式可以吗？我手机13991337595 QQ583768024。希望您能同意。 1# wry618 :lol斑竹是一等一得好同志 谢谢楼主，先收藏了 刚开始学习，收藏之！谢谢斑竹 下载了 斑竹辛苦了--- 谢谢斑竹的无私奉献
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