| contributor author | Mustafa Turan | |
| date accessioned | 2017-05-08T21:08:55Z | |
| date available | 2017-05-08T21:08:55Z | |
| date copyright | September 1992 | |
| date issued | 1992 | |
| identifier other | %28asce%290733-9372%281992%29118%3A5%28776%29.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/40475 | |
| description abstract | Backwashing of deep bed filters is achieved by fluidizing the filter media. A mathematical model for velocity gradient in two‐dimensional turbulent flow that can also be applied to flow in fluidized beds in the transitional state was developed. The theory of fluidization in a circular cross‐section column was presented. The existence of a viscous sublayer around each fluidized solid particle and the laminar sublayer thickness at the wall were neglected. To evaluate the theoretical expressions, numerical applications are carried out for filter‐bed materials of two different types of sands and anthracite coal. An indirect verification of the existence of an optimum porosity around 0.70‐0.75 during filter backwashing was observed in the laboratory experiments. The velocity gradient in backwashing of granular filters was found to be a function of power dissipation in a unit volume and coefficient | |
| publisher | American Society of Civil Engineers | |
| title | Velocity Gradient in Filter Backwashing | |
| type | Journal Paper | |
| journal volume | 118 | |
| journal issue | 5 | |
| journal title | Journal of Environmental Engineering | |
| identifier doi | 10.1061/(ASCE)0733-9372(1992)118:5(776) | |
| tree | Journal of Environmental Engineering:;1992:;Volume ( 118 ):;issue: 005 | |
| contenttype | Fulltext | |
