流体由于各部份温度不同而引起流动并传递热量的现象,称为对流。对流是一种宏观现象,然而一些流体,象空气无色无味,其对流的过程不易观察。为此,我们设计了空气对流实验器。现简介如下,供参考。 一、仪器的结构 首先应将不易观察的对流现象转换成便于观察的具体现象。因此,我们是采用蜡烛的燃烧与熄灭这一具体现象来进行的。其次,还应通过不同的条件组合,造成不同的对流条件,让学生来观察对流现象。 仪器结构,如图所示。玻璃管的直径约 The phenomenon of fluid flow and heat transfer due to different temperatures in each part is called convection. Convection is a macroscopic phenomenon, but some fluids, like air, are colorless and odorless, and their convection is not easy to observe. For this purpose, we designed an air convection experimenter. The introduction is as follows, for reference. First, the structure of the instrument First, the convective phenomenon that is not easy to observe should be converted into a specific phenomenon that is easy to observe. Therefore, we use the specific phenomenon of burning and extinguishing candles. Second, different conditions must be combined to create different convection conditions for students to observe convection. Instrument structure, as shown. The diameter of the glass tube is about