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convection 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/kənˈvekSHən/,
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convections, plural;
  1. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat

  1. the transfer of heat through a fluid (liquid or gas) caused by molecular motion
  2. (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere
  3. Convection is the movement of molecules within fluids (i.e. liquids, gases) and rheids. It cannot take place in solids, since neither bulk current flows nor significant diffusion can take place in solids.
  4. Atmospheric convection is the result of a parcel-environment instability, or temperature difference, layer in the atmosphere. It is often responsible for adverse weather throughout the world.
  5. The process of conveying something; The transmission of heat in a fluid or gas by the circulation of currents; The vertical movement of heat and moisture, especially by updrafts and downdrafts in an unstable air mass. ...
  6. (Convections (Meteorology)) "He really believes his theories on severe thunderstorms." "Yes, he is a man of strong convections."
  7. convective buildup refers to clouds with vertical development; thunderstorms, for example.
  8. A method of transferring heat by the actual movement of heated molecules, usually by a freestanding unit such as a furnace.
  9. Heat transfer by currents that flow from a warm surface to a colder one.
  10. Fluid motion which results from the action of unbalanced buoyancy forces.
  11. Currents created by heating air, which then rises and pulls cooler air behind it. Also see radiation.
  12. Convection is the transfer of heat in fluid or air, caused by the movement of the heated air or fluid itself. In a building space, warm air rises and cold air settles to create a convection loop and is termed free convection. ...
  13. A heat transfer process involving motion in a fluid (such as air) caused by the difference in density of the fluid and the action of gravity. Convection affects heat transfer from the glass surface to room air, and between two panes of glass.
  14. Transmission of energy (heat /sound) from one place to another by movement of a fluid such as air or water.
  15. the upward motion of a mass of air that has been heated. Convection is the primary way that heat is transferred in the atmosphere. It is the process by which warm air rises up from the ground, to be replaced by cold air. The cold air is then warmed and cycles upward.
  16. Dimplex offers a full line of convection baseboard heaters, as well as panel convection heaters, which are wall-mounted. These heaters are ideal for heating living areas with gentle, even heat.
  17. Movement of molecules (gases) from a region of higher air pressure to a region of lower air pressure. Airflow can also be induced by a temperature gradient (e.g., stack effect).
  18. Air naturally circulated by differences in temperature. Colder, denser air falls and displaces the lighter, warm air.
  19. The transfer of heat energy between a solid and a fluid when their temperature differ.
  20. Atmospheric motions in the vertical direction resulting from surface heating and the subsequent rising of warm air. This lifting mechanism is capable of generating the rising motions necessary for clouds and precipitation to form.
  21. The mass movement of warmed air or liquid to or from the surface of a body or object.
  22. 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.
  23. The transfer of heat by the movement of heated liquid or gas.  Vertical rising of heat energy (heat convection) in the atmosphere occurs when a shallow layer of air in contact with a hot surface warms up, becomes more buoyant (warmer air is less dense than colder air), and rises, taking with it ...
  24. The transfer of heat by means of air currents.
  25. In physics, mass motions within a fluid resulting in transport and mixing of the properties of that fluid caused by the force of gravity and by differences in density due to nonuniform temperature.