The test results indicate that there is linear relationship between surface convection coefficient of concrete and wind velocity.

结果表明，混凝土表面对流换热系数与风速基本呈线性关系。

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The receiver with a vacuum tube can greatly reduce the heat loss caused by surface convection, and hence the heat transfer efficiency can be improved effectively.

而太阳能集热器用真空管作为接收器，可以大大减小接收器外表面的散热损失，可以显著提高集热器的集热效率。

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The sparse distribution of the feathers, however, also allows considerable lateral air movement over the skin surface, thereby permitting further heat loss by convection.

然而，羽毛的稀疏分布也使得皮肤表面形成相当大量的侧向空气流动，从而可以通过对流进一步散热。

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Scientists speculate that the silicates stuck to the mantle might also be caught up in mantle convection and carried to the surface, accounting for reports of core material in lava erupting from hot, spot plumes, like those under Hawaii.

BBC: Earth's wobbles reveal deep secrets