It is typically used to refer to the capture of a wind flow of high moisture content, or in the case of tropical cyclones, the capture of drier air.. Detrainment is the opposite effect, when the air from a convective cloud, usually at its top, is injected in the environment. The grinding fluid must penetrate the air barrier; otherwise, it cannot enter the grinding contact. Whenever there is a discussion about fluid dynamics, the Bernoulli’s equation generally comes up. Air entrainment has now been an accepted fact in concrete technology for more than 45 years. This needs to be taken into account when batching and mixing. This is critical because the re-entrainment evaluation looks at onsite impacts where exhaust air can be pulled back into a building (e.g., at fresh air intake units), typically located on the sides or roofs of buildings. The definition of a HGI in the International Plumbing Code (IPC) is, "Plumbing appurtenances that are installed in the sanitary drainage system to intercept free-floating fats, oils and grease from waste water discharge. The average pump will likely fail to operate at 14 percent air entrainment. Get XML access to reach the best products. Test your knowledge - and maybe learn something along the way. The air bubbles are created during mixing of the plastic (flowable, not hardened) concrete, and most of them survive to be part of the hardened concrete. trains 1. A basic definition of entrainment is the tendency for two oscillating bodies to lock into phase so that they vibrate in harmony. Definition of Air Entrainment in Construction. UL's Firefighter Safety Research Institute has conducted an extensive Air Entrainment Study to evaluate the influence of nozzles and their ability to influence the flow path during a fire. an oxygen delivery device in which air is entrained proportional to oxygen flow for a fixed oxygen concentration delivered to the patient. Privacy policy These air bubbles are dispersed throughout the hardened cement paste but are not, by definition… The definition of a HGI in the International Plumbing Code (IPC) is, "Plumbing appurtenances that are installed in the sanitary drainage system to intercept free-floating fats, oils and grease from waste water discharge. Replacement of cement by up to 35% fly ash and 10% silica fume indicated enhanced frost resistance, without any air-entrainment. ... the capture of drier air. It is reported that, maximum flexural strength can be achieved even with air contant of 4%. See if you can get into the grid Hall of Fame ! Example sentences with "entrained air indicator", translation memory. By using our services, you agree to our use of cookies. Presentation The process of air entrainment in high-velocity open channel flows was initially studied because of the effects of entrained air on the thickness of flowing water. Learn a new word every day. Air-entrained concrete definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. UL's Firefighter Safety Research Institute has conducted an extensive Air Entrainment Study to evaluate the influence of nozzles and their ability to influence the flow path during a fire. http://www.theaudiopedia.com What is AIR ENTRAINMENT? Bernoulli's Priniciple or Effect has practical applications in the field of respiratory care in that it allows us to deliver precise oxygen concentration levels with simple devices by mixing oxygen with entrained room air. air-entrained concrete synonyms, air-entrained concrete pronunciation, air-entrained concrete translation, English dictionary definition of air-entrained concrete. Definition of Air Entrainment in Construction. Add new content to your site from Sensagent by XML. How to use entrain in a sentence. air-entrainment mask definition. It is typically used to refer to the capture of a wind flow of high moisture content, or in the case of tropical cyclones, the capture of drier air.. Detrainment is the opposite effect, when the air from a convective cloud, usually at its top, is injected in the environment. Further, the presence of air within the boundary layer reduces the shear stress between the flow layers and hence the shear force .Also it may prevent or reduce the damage caused by cavitation . Entrainment is the mixing of environmental air into a preexisting air current or cloud so that the environmental air becomes part of the current or cloud. Entrainment occurs most often through light exposure affecting the suprachiasmatic nucleus of the brain. Giga-fren. The failure of reinforced concrete is most often due to this cycle, which is accelerated by moisture reaching the reinforcing steel. Entrainment is a phenomenon of the atmosphere which occurs when a turbulent flow captures a non-turbulent flow. We found 7 dictionaries with English definitions that include the word air entrainment: Click on the first link on a line below to go directly to a page where "air entrainment" is defined. Other articles where Air-entraining cement is discussed: cement: Types of portland cement: Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of very fine air bubbles in a concrete. The bubbles are introduced into the concrete by the addition to the mix of an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). Type: Academy Video. ○   Lettris Bernoulli's Priniciple or Effect has practical applications in the field of respiratory care in that it allows us to deliver precise oxygen concentration levels with simple devices by mixing oxygen with entrained room air. Find out information about air-entraining agent. in avalanche dynamics] Schneeaufnahme {f} 3 Wörter: constr. The air entrainment in a free surface mainly results from the development of small turbulent structures in the air-water free surface, which have the capacity to trap air carrying it to the core of the flow. Entrainment is a phenomenon of the atmosphere which occurs when a turbulent flow captures a non-turbulent flow. [French entrainer, from Old French : en-, in; see en-1 + trainer, to drag; see train.] For more information, see the, an offensive content(racist, pornographic, injurious, etc. Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of very fine air bubbles in a concrete. The intersecting perimeter is a singularity in terms of both air entrainment and momentum exchange, and the air is entrapped at the discontinuity between the impinging jet flow and the receiving pool of water. Air entrained around a rotating wheel forms a barrier that impedes fluid delivery. The air bubble can be compressed a little, and so the bubbles act to reduce or absorb stresses from freezing. 'Nip it in the butt' or 'Nip it in the bud'? A windows (pop-into) of information (full-content of Sensagent) triggered by double-clicking any word on your webpage. Air entrainment is the intentional creation of tiny air bubbles in concrete. See more. Air entrainment is the process where many small air bubbles are distibuted into concrete and become part of the matrix that binds the aggregate together in the hardened concrete. The wordgames anagrams, crossword, Lettris and Boggle are provided by Memodata. • Above 20 percent entrained air: A self-priming pump is typically specified when entrained-air levels rise above 20 percent. Hubert Chanson M.E., ENSHM Grenoble, INSTN (Saclay), Ph.D. The flow of 100 per cent oxygen through the mask draws in a controlled amount of room air (21 per cent oxygen). To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares. air entrainment. Bubbles are entrained locally at the intersection of the impinging jet with the surrounding waters. Letters must be adjacent and longer words score better. Several parameters are used to describe the performance of ejectors in cooling cycles, as provided below. Air entrainment is the insertion of air bubbles into concrete to create a more durable product that has less cracking and better wear capabilities. The mixing of air currents. ), Eur. 2. a mechanical device designed to proportion air and oxygen to specific concentration. Air entrainment — how it happens, how to avoid it. In addition to entrained air, hardened concrete also contains entrapped air. Share This Post: 27/32 in the series Distillation in Practice. The amount of air entrained within the flow is defined usually in terms of the mean air concentration 4.  | Last modifications, Copyright © 2012 sensagent Corporation: Online Encyclopedia, Thesaurus, Dictionary definitions and more. 'All Intensive Purposes' or 'All Intents and Purposes'? Company Information n a low-density type of concrete throughout which small air bubbles are dispersed in order to increase its frost resistance: used for making roads. Chemistry To carry (suspended particles, for example) along in a current or into the vapor phase. [2], This entry is from Wikipedia, the leading user-contributed encyclopedia. entrained air indicator. Skill Level: Basic. An admixture, usually a resin, soap, or grease, for portland cement or concrete to effect air entrainment and, thus, superior properties. Upon awakening, morning sunlight can have a profound impact to begin the process of sustained wakefulness and end the period of sleep. While hardened concrete appears solid, it is porous, having small capillaries resulting from the evaporation of water beyond that required for the hydration reaction. Give contextual explanation and translation from your sites ! Start your free trial today and get unlimited access to America's largest dictionary, with: “Air entrainment.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/air%20entrainment. Steel expands when it rusts, and these forces create even more cracks, letting in more water. Most English definitions are provided by WordNet . It also is applied in the process of delivering aerosol treatments with medications. Interfacial aeration is defined as the air entrainment process along an air–water interface, usually parallel to the flow direction. Flooding and Entrainment in a Distillation Tray. entrainment definition: 1. the process of making something part of a liquid or flow of something and carrying it along: 2…. In hydraulic engineering, air bubble entrainment is defined as the entrapment of air bubbles and pockets that are advected within the turbulent flow. Delivered to your inbox! Air entrainment is the intentional creation of tiny air bubbles in concrete. Air Entrainment F1OW Field Induced by a Pool Fire X. C. ZHOU and J. P. GORE* llrermal Sciencesand PmptdsionCentec SchoolofMechanicalEngineering,PurdueUniversity, WestLafayette,IN 47907 A laser Doppler velocimeter (LDV) was used in conjunction with a quiescently seeded ambient enclosure to Air-entrained concrete is produced using air-entraining portland cement, or by the introduction of air-entraining agents, under careful engineering supervision, as the concrete is mixed on the job. Air entrainment admixture quantities required to obtain a specific finished air content for mix designs are based on a number of variables including size of aggregate, fineness and quantity of cement and use of SCMs such as fly ash and silica fume. air-oxygen blenders definition. This increases the resistance of the concrete to freeze-thaw damage in cold climates.… The flow of 100 per cent oxygen through the mask draws in a controlled amount of room air (21 per cent oxygen). It is reported that, maximum flexural strength can be achieved even with air contant of 4%. Tips: browse the semantic fields (see From ideas to words) in two languages to learn more. The benefits of smaller machinery are obvious: economy of materials, less energy consumption, less square-footage required. Explanation of air-entraining agent Find out more, Please help by adding an introductory section to this article. The influence of an air-entraining admixture and a superplasticizer on the formation and behaviour of air bubbles in a self-compacting concrete mix are analysed in this paper. Choose the design that fits your site. The web service Alexandria is granted from Memodata for the Ebay search. Fluid or Air Entrainment. Fluid or Air Entrainment. Air Entrainment Mechanisms from Artificial Supercavities: Insight based on numerical simulations Michael P. Kinzel Jules W. Lindau Robert F. Kunz Penn State University Applied Research Laboratory State College, PA, USA ABSTRACT Using multiphase computational simulations based on the Navier-Stokes equations, we examine the internal gaseous flows of artificially ventilated supercavities. Meaning of entrainment. Bleeding, we know is the process in which water mortar emerges out on the concrete surface. The SensagentBox are offered by sensAgent. Ro, Cookies help us deliver our services. You can also try the grid of 16 letters. entrainment definition: 1. the process of making something part of a liquid or flow of something and carrying it along: 2…. at this level of air entrainment. Key words: stepped chute, air-entrainment, air-water flow properties, macro-roughness elements, skimming flow. Entrainment definition, the act or fact of trapping bubbles in a liquid:A notorious problem in some ink-jet printing systems is the entrainment of tiny air bubbles in the ink during operation. What does entrainment mean? Please tell us where you read or heard it (including the quote, if possible). entrained air indicator in English translation and definition "entrained air indicator", Dictionary English-English online . Commonly available masks deliver 24, 28, 31, 35, or 40 per cent oxygen. Examples of localised aeration include air entrainment by plunging water jet and at hydraulic jump. 2. The bubbles are introduced into the concrete by the addition to the mix of an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). … Physics concepts can go in one ear and out the other so we've added a few more definitions of it to help it sink in. entrainment boundary: Mitreißgrenze {f} meteo. Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Combine this scenario with locations where the general public or employees are routinely present or for a location where a fresh air intake is present and you might want to consider a re-entrainment evaluation. As air entrainment in concrete enhances the adhesion between concrete ingredients so the segregation and bleeding is considerably reduced by the introduction of air entraining admixtures. In addition, it can reset the timing of sleep, moving it slightly earlier. Air entraining was introduced in the 1930s and most modern concrete, especially if subjected to freezing temperatures, is air-entrained. Air entrainment admixture quantities required to obtain a specific finished air content for mix designs are based on a number of variables including size of aggregate, fineness and quantity of cement and use of SCMs such as fly ash and silica fume. This increases the resistance of the concrete to freeze-thaw damage in cold climates.… Read More Entrapped air is considered to not make a positive contribution to durability and is undesirable though not entirely avoidable. Air-entrained concrete definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Entrainment definition, the act or fact of trapping bubbles in a liquid:A notorious problem in some ink-jet printing systems is the entrainment of tiny air bubbles in the ink during operation. 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