将热对流和非等温化学反应器建模作为多物理场建模实例来讲解。在后续章节中将给出更多的多物理场建模实例，不过其中某个“单物理场”模型可能是后续章节研究的核心。我们还会引入变量连续性的概念，其本质就是从函数空间、甚至线性系统的解开始，步进得到高非线性问题的解。接下来我们会改变热传导模型，研究温度处于冰点和沸点之间的水加热时的微分边界条件，这时浮力完全依赖于温度。大尺度的模拟表明会出现温度的分层现象。之后我们研究一个耦合了质量和能量传递的非等温管式反应器。最后介绍一个从外部流动到小球孔中发生扩散的化学反应。-Thermal convection and non-isothermal chemical reactor modeling multi-physics modeling examples to explain. More multi-physics modeling examples given in the following chapters, but one single physical field model is the core of the subsequent chapters. We will also introduce the concept of variable continuity, by its very nature is a function space, and even the linear system began, step to the solution of nonlinear problems. Next we will change the heat conduction model to study the differential heating temperature is between freezing and boiling water boundary conditions, then the buoyancy is entirely dependent on the temperature. Large-scale simulations indicate that the temperature stratification. Then we study a coupled mass and energy delivery, non-isothermal tubular reactor. Finally, the proliferation of chemical reaction from the external flow to the ball hole.