Flow Control Using Rotating Cylinders: Effect of GapSource: Journal of Applied Mechanics:;2003:;volume( 070 ):;issue: 005::page 762Author:S. Mittal
DOI: 10.1115/1.1601250Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flow past a bluff body can be controlled significantly by placing small rotating cylinders at appropriate locations. Computational results for control of Re=104 flow past a circular cylinder are presented. Two control cylinders of one-twentieth the diameter of the main cylinder rotate at a rate such that their tip speed is five times the free-stream speed of the flow. Computations are carried out for various values of the gap between the main and control cylinders. A stabilized finite element method is utilized to solve the incompressible Navier-Stokes equations in the primitive variables formulation. A gap value of one-tenth the diameter of the main cylinder is found to be close to the optimal value. Compared to the flow past an isolated cylinder a very significant reduction in the drag and unsteady forces is observed for the flow with control.
keyword(s): Flow (Dynamics) , Cylinders , Flow control AND Drag (Fluid dynamics) ,
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| contributor author | S. Mittal | |
| date accessioned | 2017-05-09T00:09:18Z | |
| date available | 2017-05-09T00:09:18Z | |
| date copyright | September, 2003 | |
| date issued | 2003 | |
| identifier issn | 0021-8936 | |
| identifier other | JAMCAV-26564#762_1.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/127832 | |
| description abstract | The flow past a bluff body can be controlled significantly by placing small rotating cylinders at appropriate locations. Computational results for control of Re=104 flow past a circular cylinder are presented. Two control cylinders of one-twentieth the diameter of the main cylinder rotate at a rate such that their tip speed is five times the free-stream speed of the flow. Computations are carried out for various values of the gap between the main and control cylinders. A stabilized finite element method is utilized to solve the incompressible Navier-Stokes equations in the primitive variables formulation. A gap value of one-tenth the diameter of the main cylinder is found to be close to the optimal value. Compared to the flow past an isolated cylinder a very significant reduction in the drag and unsteady forces is observed for the flow with control. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Flow Control Using Rotating Cylinders: Effect of Gap | |
| type | Journal Paper | |
| journal volume | 70 | |
| journal issue | 5 | |
| journal title | Journal of Applied Mechanics | |
| identifier doi | 10.1115/1.1601250 | |
| journal fristpage | 762 | |
| journal lastpage | 770 | |
| identifier eissn | 1528-9036 | |
| keywords | Flow (Dynamics) | |
| keywords | Cylinders | |
| keywords | Flow control AND Drag (Fluid dynamics) | |
| tree | Journal of Applied Mechanics:;2003:;volume( 070 ):;issue: 005 | |
| contenttype | Fulltext |