排序方式: 共有4条查询结果,搜索用时 15 毫秒
1
1.
R.S. Gioria J.R. Meneghini J.A.P. Aranha I.C. Barbeiro B.S. Carmo 《Journal of Fluids and Structures》2011,27(5-6):792-797
We assess the effect of the choice of spanwise periodic length on simulations of the flow around a fixed circular cylinder. The Reynolds number is set to 400 because, at this value, both lift coefficient and shedding frequency show significant drop due to three-dimensional flow structures. From the analysis of the three-dimensionalities of the wake and of the integral quantities such as Strouhal number, RMS of lift coefficient and energy contained in the three-dimensional portion of the flow we obtain an estimate of the minimum spanwise length to satisfactorily represent the flow. Furthermore, we observe a distinct wake behavior when the spanwise length is approximately the mode B instability wavelength. 相似文献
2.
Gonçalves Daniel Bozzi Barbeiro Lilian Tonon de Souza Patrícia Caldas Batista Eduardo Augusto de Almeida Meirelles Antonio José 《Journal of Thermal Analysis and Calorimetry》2022,147(21):11857-11874
Journal of Thermal Analysis and Calorimetry - Glycerol is a by-product from transesterification for biodiesel production. Due to the presence of hydroxyl groups (–OH), glycerol is pointed as... 相似文献
3.
** Email: silvia{at}mat.uc.pt*** Email: ferreira{at}mat.uc.pt**** Email: grigo{at}math.tu-berlin.de In this paper we study the convergence of a centred finite differencescheme on a non-uniform mesh for a 1D elliptic problem subjectto general boundary conditions. On a non-uniform mesh, the schemeis, in general, only first-order consistent. Nevertheless, weprove for s (1/2, 2] order O(hs)-convergence of solution andgradient if the exact solution is in the Sobolev space H1+s(0,L), i.e. the so-called supraconvergence of the method. It isshown that the scheme is equivalent to a fully discrete linearfinite-element method and the obtained convergence order isthen a superconvergence result for the gradient. Numerical examplesillustrate the performance of the method and support the convergenceresult. 相似文献
4.
Sílvia Barbeiro 《Numerical Functional Analysis & Optimization》2013,34(5-6):491-506
Compactness of embeddings in discrete counterparts of Sobolev spaces is considered. We study the embeddings in spaces of cell-centered grid functions, in one- and two-dimensional domains. No restrictions are made on the mesh-ratios of the underlying meshes. 相似文献
1