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Convection
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Fluid circulation driven by large temperature gradients; the transfer of heat by this automatic circulation.
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Convection, английский
Convection, английский
Describes the vertical air motion that occur when the atmosphere is unstable. convection often gives rise to the formation of convective cloud (cumulus, towering cumulus and thunderclouds) and showery precipitation.
Convection, английский
In physics, convection is the transport and mixing of properties (energy, heat, moisture, etc.) of a fluid by mass motion of that fluid. in meteorology, convection generally refers to such transport and mixing in the vertical direction, and advection refers to processes in the horizontal plane.
Конвекция, русский
- (от лат . convectio - принесение, доставка), перемещение макроскопических частей среды (газа, жидкости), приводящее к переносу массы, теплоты и др. физических величин. различают естественную (свободную) конвекцию, вызванную неоднородностью среды (градиентами температуры и плотности), и вынужденную конвекцию, вызванную внешним механическим воздействием на среду. с конвекцией в атмосфере земли связано образование облаков, с конвекцией на солнце - грануляция.
- Перенос теплоты в жидкостях, газах или сыпучих средах потоками вещества
- Перенос теплоты в неравномерно нагретой жидкой, газообразной или сыпучей среде, осуществляющийся вследствие движения среды и ее теплопроводности; способ нагревания детали для формирования покрытия, при котором энергия передается посредством циркуляции нагретого воздуха.
- Упорядоченные движения внутри слоя воздуха, приводящие к вертикальному переносу тепла, количества движения и т.д.
- Тепломассоперенос в жидких и газообразных средах, направленный на выравнивание температуры во всем объеме жидкости или газа. различают естественную и вынужденную конвекцию. естественная конвекция прекращается после выравнивания температуры. вынужденная к., при наличии источника тепла, может продолжаться неопределенно долго. в формировании температурного режима нефтяных и газовых залежей к. зачастую играет определяющую роль.
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Circulation, английский
- Циркуляция
- Circulation (of the blood) movement of blood around the body from the heart through the arteries to the capillaries and back to the heart through the veins she has poor circulation in her legs. rub your hands to get the circulation going. comment: blood circulates around the body, carrying oxygen from the lungs and nutrients from the liver through the arteries and capillaries to the tissues. the capillaries exchange the oxygen for waste matter such as carbon dioxide which is taken back to the lungs to be expelled. at the same time the blood obtains more oxygen in the lungs to be taken to the tissues. the circulation pattern is as follows: blood returns through the veins to the right atrium of the heart. from there it is pumped through the right ventricle into the pulmonary artery, and then into the lungs. from the lungs it returns through the pulmonary veins to the left atrium of the heart and is pumped from there through the left ventricle into the aorta and from the aorta into the other arteries.
- The passing of any liquid or gas to the end of the drill string and back to the surface in the process of drilling a borehole.
- The movement of air currents through mine openings.
- An item that is communicated to team members on a group work site, and that supports confirmation and tracking of which team members have viewed it. cisc (n)
- Caused by quick changes in pressure, cavitation is the creation of vapor cavities within a low-pressure liquid. cavitation can cause severe wear through cyclic stress on metal surfaces as they implode.
Temperature, английский
- Température
- Dry-bulb - temperature of air as indicated by a standard thermometer.
- An expression of thermal energy density. how hot or cold an object is.
- The measure of the intensity of heat that a substance possesses.
- Температура
- Температура тмр test methods and procedures методы проведения испытаний и последовательность их проведения тмр theodolite measuring point кинотеодолитная станция
- Temperatura, fiebre
- The condition attained when the wetted wick of a wet-bulb thermometer has reached a stable and constant temperature when exposed to moving air in excess of 900 ft (274.3 m) per minute.
- 1. the heat of the body or of the surrounding air, measured in degrees the doctor asked the nurse what the patient’s temperature was. his temperature was slightly above normal. the thermometer showed a temperature of 99°f. to take a patient’s temperature to insert a thermometer in someone’s body to see what his or her body temperature is they took his temperature every four hours. when her temperature was taken this morning, it was normal. 2. illness when your body is hotter than normal he’s in bed with a temperature. her mother says she’s got a temperature, and can’t come to work. comment: the average body temperature is about 37° celsius or 98° fahrenheit. this temperature may vary during the day, and can rise if a person has taken a hot bath or had a hot drink. if the environmental temperature is high, the body has to sweat to reduce the heat gained from the air around it. if the outside temperature is low, the body shivers, because rapid movement of the muscles generates heat. a fever will cause the body temperature to rise sharply, to 40°c (103°f) or more. hypothermia exists when the body temperature falls below about 35°c (95°f).
- Повышение температуры бетона ~ of truss высота фермы jet ~ высота подъёма горизонтальной неизотермической приточной струи, «всплывающей» над приточным отверстием
- Температура ~ of adiabatic saturation температура адиабатического насыщения
- Normal adult temperature varies among horses, but will usually range in degrees from 99.5°f to 100.5°f.
- A measure of the average kinetic energy of a material. the standard unit of temperature is a kelvin, (k). temperature determines the direction of heat flow between any two systems in thermal contact. heat will always flow from the area of higher temperature (t source) to one of lower temperature (t sink). temperature gradient (?t)
- A measure of the degree of molecular motion of a material compared to a reference point. temperature is measured in degrees farenheit (melting point of ice = 32 º f, boiling point of water = 212 º f) or degrees celsius (melting point of ice = 0 º c, boiling point of water = 100 º c).
- The degree of sensible heat of a body as measured by a thermometer or similar instrument.
- Measure of the intensity of particle motion in degrees celsius (°c) or degrees fahrenheit (°f) or, in the absolute scale, kelvin (k), where the increment of 1 k = 1 °c = 1.8 °f.
- Temperature of surrounding atmosphere. also called dry bulb temperature. compare standard atmospheric conditions. ampere (a): si unit of electric current. ampere per meter (a·m–1): si derived unit of magnetic field intensity. the measurement 1 a·m–1, for example, describes a current of 1 a flowing through a coil that is 1 m in diameter. compare oersted. ampere turn (at): in magnetic particle testing, unit for expressing the magnetomotive force required for magnetization using a coil in terms of the product of the number of coil turns and the current in amperes flowing through the coil. amplitude, echo: in ultrasonic testing, the vertical height of a received signal on an a-scan, measured from base to peak for a video presentation or from peak to peak for a radio frequency presentation.
- Measure of the intensity of particle motion in degrees celsius (°c), degrees fahrenheit (°f) or, in the absolute scale, kelvin (k) or degrees rankine (°r). an increment of 1 k = 1 °c = 1.8 °r = 1.8 °f. compare heat.
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Conveyor, английский
Convection, английский
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