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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Modeling of the steady-state temperature field in lava flow levees
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Modeling of the steady-state temperature field in lava flow levees

机译：熔岩流堤中稳态温度场的建模

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The rationale of lava flow deviation is to prevent major damage, and, among the possible techniques, the opening of the flow levees has often been demonstrated to be suitable and reliable. The best way to open the levees in the right point, in order to obtain the required effect, is to produce an explosion in situ, and it is then necessary to map with the highest precision the temperature field inside the levees, in order to design a safe and successful intervention. The levees are formed by lava flows due to their non-Newtonian rheology, where the shear stress is lower than the yield stress. The levees then cool and solidify due to heat loss into the atmosphere. In this work we present analytical solutions of the steady-state heat conduction problem in a levee using the method of conformal mapping for simple geometrical shapes of the levee cross-section (triangular or square). Numerical solutions are obtained with a finite-element code for more complex, realistic geometries.
机译：熔岩流向偏离的基本原理是防止重大破坏，并且在可能的技术中，经常证明打开堤坝是合适和可靠的。为了获得所需的效果，在正确的位置打开堤坝的最佳方法是在现场产生爆炸，然后有必要以最高精度绘制堤坝内部的温度场，以便进行设计安全成功的干预。由于非牛顿流变性，熔岩流形成了堤坝，其中剪应力低于屈服应力。然后，由于热量散失到大气中，堤防冷却并固化。在这项工作中，我们使用保形映射方法对堤防横截面的简单几何形状（三角形或正方形）提出了堤防中稳态导热问题的解析解。对于更复杂，更实际的几何图形，可以使用有限元代码获得数值解。

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