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backwash flow

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  • Backwash (physical phenomenon) — Backwash is the backwards flow of air or water. Backwash can be created naturally by waves rebounding off a beach or other obstacle. It is created by propulsion devices such as an oar or engine. Unlike a slipstream, a backwash is harder to travel …   Wikipedia

  • backwash — ack wash , n. 1. The flow of water propelled backward by the propeller, paddle wheel, or oars of a boat. [PJC] 2. (Aeron.) The backward flowing air within the wash of an airplane, caused mostly by the engine. [PJC] …   The Collaborative International Dictionary of English

  • backwash — ack wash , v. t. 1. To clean the oil from (wool) after combing. Ash. [1913 Webster] 2. (Chem.) To clean (a filter, a chromatography column, a water softener, etc.) by passing liquid through in the reverse of the normal direction of flow. This… …   The Collaborative International Dictionary of English

  • backwash — [bak′wôsh΄] n. 1. water moved backward, as by a ship, an oar, etc. 2. a backward current or flow, as of air from an airplane propeller 3. a reaction or commotion caused by some event …   English World dictionary

  • Backwash — The word Backwash may refer to:* Backwash (geography), the water that rolls back down a beach after a wave has broken * Backwash (physical phenomenon), the backwards flow of air or water * Backwash, the process of thoroughly cleaning a pool… …   Wikipedia

  • backwash — backwasher, n. /bak wosh , wawsh /, n. 1. Naut. water thrown backward by the motion of oars, propellers, paddle wheels, etc. 2. Aeron. the portion of the wash of an aircraft that flows to the rear, usually created by the power plant. Cf. wash… …   Universalium

  • backwash — back|wash [ˈbækwɔʃ US wo:ʃ, wa:ʃ] n [U] 1.) a backward flow of water, caused by an ↑oar, wave etc 2.) the bad situation that remains after something bad has happened ▪ the backwash of the company s failure …   Dictionary of contemporary English

  • backwash — noun a) The backward flow of water from oars or propeller. b) The similar flow of air from an aircraft engine. See Also: wake …   Wiktionary

  • backwash — noun Date: 1869 1. a backward flow or movement (as of water or air) produced especially by a propelling force; also the fluid that is moving backward 2. consequence, aftermath …   New Collegiate Dictionary

  • environmental works — ▪ civil engineering Introduction       infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …   Universalium

  • Membrane bioreactor — (MBR) is the combination of a membrane process like microfiltration or ultrafiltration with a suspended growth bioreactor, and is now widely used for municipal and industrial wastewater treatment with plant sizes up to 80,000 population… …   Wikipedia

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