The flow past a circular cylinder constrained under large blockage exhibits features even in the steady regime, that strikingly contrast those corresponding to its unbounded counterpart. While several studies are dedicated towards understanding this classical flow problem in unbounded medium, surprisingly, very little efforts have been put forward to extract details of flow alterations in a highly confined flow. The absence of flow solutions and comprehensive data acts as an impetus behind the current work that computes steady, two-dimensional flow over the Reynolds number, $Re$ range of 4–100 under a large blockage of 0.9. The imposition of large blockage stabilizes the flow; it enhances the $Re$ limit of fore-aft flow symmetry to 5, delays the onset of laminar separation to $Re=27.8$ and preserves the steady nature of flow even at $Re=100$. The wake grows non-linearly with $Re$. For $Re\le 5$, the base pressure represents the minimum surface pressure and eliminates any development of adverse pressure gradient along the cylinder. The order of magnitude rise in the drag and drop of surface pressure are overwhelming. There exists a competition of pressure gradient on the sidewalls and cylinder surface for $6\le Re<15$.

甚至在稳定状态下，流经受大堵塞限制的圆柱体的流量也表现出特征，这与对应于其无边界对应物的那些形成鲜明对比。尽管有几项研究致力于理解无边界介质中的经典流动问题，但令人惊讶的是，很少有人为提取高度受限的流动中的流动变化细节做出任何努力。缺乏流动解决方案和全面的数据是当前工作的推动力，该工作在雷诺数上计算稳定的二维流动，$\mathrm{[R}Ë$在0.9的较大障碍下范围为4-100。施加大的堵塞物可以稳定流动。它增强了$\mathrm{[R}Ë$ 前后流动对称性限制为5，延迟层流分离的开始 $\mathrm{[R}Ë=27。8$ 并保持流动的稳定特性 $\mathrm{[R}Ë=100$。尾随非线性增长$\mathrm{[R}Ë$。为了$\mathrm{[R}Ë\le 5$，基本压力代表最小表面压力，并消除了沿气缸产生的不利压力梯度的任何情况。表面压力的阻力和下降的数量级上升是压倒性的。在侧壁和圆柱体表面存在压力梯度竞争$6\le \mathrm{[R}Ë<15$。