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Fiche 1,  Justifications,  Anglais

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... the result of air's lower density at elevated temperatures and its affinity to rise. Cooler air sinks due to the increase in density.  4, fiche 1, Anglais, - natural%20convection

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Convection. Process of heat [(transfer of heat)] carried from one point to another by movement of a liquid or a gas (i.e., air). Natural convection is caused by expansion of the liquid or gas when heated. Expansion reduces the density of the medium, causing it to rise above the cooler, more dense portions of the medium. Gravity heating systems are examples of the profitable use of natural convection. The air, heated by the furnace, becomes less dense (consequently lighter) and rises, distributing heat to the various areas of the house without any type of blower. When a blower is used, the heat transfer method is called "forced convection."  5, fiche 1, Anglais, - natural%20convection

Fiche 1,  Justifications,  Français

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Dans la convection libre (ou naturelle), le mouvement est dû à la seule action de la pesanteur, lorsque des différences de masse volumique provenant de différences de température rompent l'équilibre hydrostatique.  2, fiche 1, Français, - convection%20naturelle

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La convection, qui est un mouvement ascendant et descendant des molécules d'un fluide subissant un réchauffement, est l'un des trois phénomènes de la transmission de la chaleur entre deux corps (ou fluides) à températures différentes.  4, fiche 1, Français, - convection%20naturelle

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natural convection; convection naturelle : termes utilisés entre autre dans le domaine du chauffage.  5, fiche 1, Français, - convection%20naturelle

Fiche 1,  Justifications,  Espagnol

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Convección debida a una diferencia de densidades entre diferentes partes de un fluido.  2, fiche 1, Espagnol, - convecci%C3%B3n%20natural

Fiche 2,  Justifications,  Anglais

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Convection caused by density differences within the air.  3, fiche 2, Anglais, - free%20convection

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Free convection is the rising of heated air and the sinking of cooler air without the need of external forces.  4, fiche 2, Anglais, - free%20convection

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Convection ... is a principal means of energy transfer. Distinction is made between free convection (gravitational or buoyant convection), motion caused only by density differences within the fluid; and forced convection, motion induced by mechanical forces such as deflection by a large-scale surface irregularity, turbulent flow caused by friction at the boundary of a fluid, or motion caused by any applied pressure gradient. Free and forced convection are not necessarily exclusive processes. On a windy day with overcast sky, the heat exchange between ground and air is an example of forced convection. On a sunny day with a little wind where the ground temperature rises, both kinds of convection take place.  5, fiche 2, Anglais, - free%20convection

Fiche 2,  Justifications,  Français

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Convection provoquée par des différences de densité de l'air.  1, fiche 2, Français, - convection%20libre

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[La] convection naturelle [...] est causée par le réchauffement diurne de la surface terrestre, résultant souvent en la formation de nuages Cumulus.  2, fiche 2, Français, - convection%20libre

Fiche 2,  Justifications,  Espagnol

Record number: 2, Textual support number: 1 DEF

Convección producida por diferencias de densidad dentro del aire.  1, fiche 2, Espagnol, - convecci%C3%B3n%20libre