Development of adaptive wall functions for an elliptic-blending model
Development of adaptive wall functions for an elliptic-blending model
复制标题
椭圆混合模型的自适应壁函数的开发
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
D. Laurence
中科院分区：
文献类型：
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作者：
F. Billard;K. Osman;D. Laurence
本文介绍了基于一个三方程加椭圆混合涡粘性模式的自适应墙函数的发展和验证，该函数允许局部“到墙”的分辨率。提出了两种壁面处理方法：1/壁函数值作为边界条件(局部处理)或2/壁函数值分布在壁面附近的一系列单元上应用(针对非结构网格的分区处理)。建议的墙体处理方法旨在允许模型预测与所使用的墙体非结构网格细化类型无关。为了评估这一性质，计算了几种类型网格的一维和二维槽道流动。为了测试分区处理，还将该方法应用于具有任意数量的连续内部节点的网格上。最后，考虑了粗细网格混合区域的肋壁通道内的换热问题。
The paper presents the development and validation of adaptive wall functions that allow local “downto-the-wall” resolution based on a three-equation plus elliptic-blending eddy-viscosity model. Two wall-treatments are proposed: 1/ the wall function values are applied as boundary conditions (local treatment) or 2/ the wall function profiles are applied over a range of cells in the wall vicinity (zonal treatment aimed for unstructured meshes). The proposed wall treatments are designed to allow the model predictions to be independent of the type of wall unstructured mesh-refinement to be used. To assess this property, oneand two-dimensional channel flows are computed for several types of meshes. To test the zonal treatment, the method is also applied on meshes with an arbitrary amount of consecutive inner nodes “removed”. Lastly the case of heat transfer in a ribbed wall passage with mixed coarselyand finely-meshed regions is considered.