convection meaning in tamil

As it descends, it warms again and the cycle repeats itself. As the moist air rises, it cools, causing some of the water vapor in the rising packet of air to condense. The act of convicting; the act of proving, finding, or Convection definition, the transfer of heat by the circulation or movement of the heated parts of a liquid or gas. For instance, a convection oven works by forced convection, as a fan which rapidly circulates hot air forces heat into food faster than would naturally happen due to simple heating without the fan. [18] This wind pattern applies a stress to the subtropical ocean surface with negative curl across the Northern Hemisphere,[19] and the reverse across the Southern Hemisphere. Typically this is caused by a variable composition of the fluid. r This brings the sea breeze, air cooled by the water, ashore in the day, and carries the land breeze, air cooled by contact with the ground, out to sea during the night. The causes of convection are generally described as one of either "natural" ("free") or "forced", although other mechanisms also exist (discussed below). All thunderstorms, regardless of type, go through three stages: the developing stage, the mature stage, and the dissipation stage. Tamil meaning of Convection is as below... Convection : வெப்பச்சலனம். The stack effect helps drive natural ventilation and infiltration. Definition of Conviction in the Online Tamil Dictionary. In forced convection, also called heat advection, fluid movement results from external surface forces such as a fan or pump. This effect can cause liquids to flow against the force of gravity. In the presence of a temperature gradient this results in a nonuniform magnetic body force, which leads to fluid movement. Discrete convective cells in the atmosphere can be seen as clouds, with stronger convection resulting in thunderstorms. [citation needed], In a zero-gravity environment, there can be no buoyancy forces, and thus no natural (free) convection possible, so flames in many circumstances without gravity smother in their own waste gases. ≫ Convective heat transfer is one of the major types of heat transfer, and convection is also a major mode of mass transfer in fluids. Convection is the transfer of heat due to the bulk movement of molecules within fluids (gases and liquids), including molten rock ().Convection includes sub-mechanisms of advection (directional bulk-flow transfer of heat), and diffusion (non-directional transfer of energy or … Convection Radiation; Meaning: Conduction is a process in which transfer of heat takes place between objects by direct contact. Reference: Wikipedia, Last Update: 2016-03-10 / Quantifying natural versus forced convection. Forced convection is typically used to increase the rate of heat exchange. If enough instability is present in the atmosphere, this process will continue long enough for cumulonimbus clouds to form, which support lightning and thunder. Conviction: குற்றவாளி என நிருபித்தல். From professional translators, enterprises, web pages and freely available translation repositories. Lesson 6: Unraveling the Gulf Stream Puzzle - On a Warm Current Running North. Heat transfer by natural convection plays a role in the structure of Earth's atmosphere, its oceans, and its mantle. The Sun warms the ground, which in turn warms the air directly above it. Cloud Formation Processes", "The Role of Mountains in the South Asian Monsoon Circulation", 10.1175/1520-0469(1975)032<1515:TROMIT>2.0.CO;2, "Fog And Stratus – Meteorological Physical Background", "A Severe Weather Primer: Questions and Answers about Thunderstorms", National Oceanic and Atmospheric Administration. At the consumption edges of the plate, the material has thermally contracted to become dense, and it sinks under its own weight in the process of subduction at an ocean trench. If the container contains particles of different sizes, the downward-moving region at the sides is often narrower than the largest particles. The rising part of the granules is located in the center where the plasma is hotter. Conviction definition Noun. the vertical transport of atmospheric properties, especially upward (distinguished from, a process of heat transfer through a gas or liquid by bulk motion of hotter material into a cooler region, the process by which masses of relatively warm air are raised into the atmosphere, often cooling and forming clouds, with compensatory downward movements of cooler air, the slow circulation of subcrustal material, thought to be the mechanism by which tectonic plates are moved. G Fluid movement during convection may be invisibly slow, or it may be obvious and rapid, as in a hurricane. Gravitational convection, like natural thermal convection, also requires a g-force environment in order to occur. [6] Because of the different adiabatic lapse rates of moist and dry air, the air on the leeward slopes becomes warmer than at the same height on the windward slopes. Tamil Definition; convection: வெப்பச்சலனம்: forced convection: தூண்டியமேற்காவுகை: normal convection: இயல்பானமேற்காவுகை A convection oven is an oven that has fans to circulate air around food, using the convection mechanism to cook food faster than a conventional oven. Published by Houghton Mifflin Company. All rights reserved. Thus, larger particles tend to become sorted to the top of such a mixture. National Environmental Satellite, Data, and Information Service (2009). Below the photosphere is a layer of much larger "supergranules" up to 30,000 kilometers in diameter, with lifespans of up to 24 hours. This can be contrasted with conductive heat transfer, which is the transfer of energy by vibrations at a molecular level through a solid or fluid, and radiative heat transfer, the transfer of energy through electromagnetic waves. [24], Mantle convection is the slow creeping motion of Earth's rocky mantle caused by convection currents carrying heat from the interior of the earth to the surface. Thermomagnetic convection can occur when an external magnetic field is imposed on a ferrofluid with varying magnetic susceptibility. Online dating has made acronyms more inscrutable—and more fun—than ever. This hot added material cools down by conduction and convection of heat. The New Dictionary of Cultural Literacy, Third Edition The Earth's surface is divided into a number of tectonic plates that are continuously being created and consumed at their opposite plate boundaries. Gooch J.W. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition However, in mechanics, the correct use of the word "convection" is the more general sense, and different types of convection should be further qualified, for clarity. The act of convicting; the act of proving, finding, or adjudging, guilty of an offense. Radition alludes to the mechanism in which heat is transmitted without any physical contact between objects. Find more Tamil words at wordhippo.com!  , natural convection may be neglected. A. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins [2][3] However, in thermodynamics "convection" often refers specifically to heat transfer by convection.[4]. The motion of warm material that rises, cools off, and sinks again, producing a continuous circulation of material and transfer of heat. I, The Foundations of Science: Science and Hypothesis, The Value of Science, Science and Method, A Guide to the Scientific Knowledge of Things Familiar, Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 8. Published by Houghton Mifflin Harcourt Publishing Company. Variable salinity in water and variable water content in air masses are frequent causes of convection in the oceans and atmosphere which do not involve heat, or else involve additional compositional density factors other than the density changes from thermal expansion (see thermohaline circulation). Atmospheric circulation is the large-scale movement of air, and is a means by which thermal energy is distributed on the surface of the Earth, together with the much slower (lagged) ocean circulation system. Convection may happen in fluids at all scales larger than a few atoms. I know,” cried Vane—“convection: it has to do with water expanding and rising when it is hot and descending when it is cold. Usage Frequency: 1