That the earth has an iron - rich liquid core , sufficient energy to drive convection and a coriolis force to twist the convecting fluid are primary reasons why the geodynamo has sustained itself for billions of years 地球拥有富含铁的液态核心、有足够的能量驱动对流，并具有科氏力可使对流的流体扭转，这些是地球发电机之所以能自我维持数十亿年的主要原因。
3.
Heat convected , a mode of motion developed by such combustion , was constantly and increasingly conveyed from the source of calorification to the liquid contained in the vessel , being radiated through the uneven unpolished dark surface of the metal iron , in part reflected , in part absorbed , in part transmitted , gradually raising the temperature of the water from normal to boiling point , a rise in temperature expressible as the result of an expenditure of 72 thermal units needed to raise i pound of water from 50 to 212 fahrenheit 燃烧所引起的运动形式之一-热对流传热，不断地加速度地从热源体传导给容器中的液体，由那凹凸不平未经打磨的黑色铸铁面把热向周围发散出去一部分反射回来，一部分被吸收，另一部分被传导，使水的温度从常温逐渐升到沸点。这种温度的上升可作为消费结果标志如下：将一磅水从华氏五十度加热到二百十二度，需耗七十二热量单位。
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In this paper , using phoenics software to compute and analyze the variety rule of the convecting transfer heat at the basis of computing and analyzing the temperature and velocity field of one underfloor supply air room with a focus hot source , and concluding that the number of the hot source and the supply air outlet > the intensity of the hot source and the volume of supply air will influence convecting transfer heat , and obtained its correlativity formula 本文针对一下部有集中热源的地板送风空调小室，利用phoenics软件，在计算分析小室内气流的速度场及温度场的基础上，对对流热转移量的变化规律做了计算分析，最后得出对于下送风小室的对流热转移量与热源的个数、送风口个数、热源强度、送风量等因素有关，并且得出了其相关关系式。
5.
As the return of flow is being , one side the heat gain of higher zone will be lead back , on the other hand , the heat has been transmitted to upside also will return , so the heat gain will incr ease . the methods of using numerical simulating has been used to analyze the factors influecing convecting transfer heat in this paper 实际运行时由于空气的回返，一方面会把上部的得热带回工作区，另一方面也会把下部已传送上去的热量又带回，从而增加了下部的得热量，本文就影响对流热转移量的因素利用数值模拟的方法做了一初步的研究。
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At the same time , i discover that the number of the return air inlet has a little influecing and it can be neglected . when there is hot resource at upperside of the room , the hot jet and supply air jet together affecting . at the same lower part heat intensity , a utmost wind speed exist , the supply air speed lower , the more heat intensity on the upside , the less convecting transfer heat , whereas 对于上部有热源的条件下，则其对流热转移量的变化关系是由热射流与送风冷射流共同作用影响的，在下部热源强度相同的条件下，存在一极限风速，在该风速以下，上部热源强度越大，则对流热转移量越小，反之在该风速以上，上部热源强度越大，则对流热移量越大。
