Comparison of entropy production rates in two different types of self-organized flows: Benard convection and zonal flow
Comparison of entropy production rates in two different types of self-organized flows: Benard convection and zonal flow
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DOI：
10.1063/1.3675854
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发表时间：
2012-01-01
影响因子：
2.2
通讯作者：
Yoshida, Z.
中科院分区：
文献类型：
--
作者：
Kawazura, Y.;Yoshida, Z.
通过引入一个热力学唯象模型并评估相应的熵产生率（EP），对流体或等离子体中两种不同类型的自组织和持续有序运动——一种是贝纳德对流（或流光），另一种是带状流——进行了比较。这两个系统在其等效电路中具有不同的拓扑结构：贝纳德对流由线性和非线性电导的并联来模拟，而带状流由串联来模拟。驱动系统的“电源”也是运行模式的一个决定因素。当能量通量是一个控制参数时（如在通常的等离子体实验中），驱动器由一个恒流电源来模拟，而当两个独立边界之间的温差受到控制时（如在通常的计算研究中），驱动器由一个恒压电源来模拟。当恒流电源驱动系统时，并联（串联）连接系统倾向于使总熵产生率最小化（最大化）。当连接恒压电源时，这种最小/最大关系会反转。（c）2012美国物理学会。[doi:10.1063/1.3675854]
Two different types of self-organizing and sustaining ordered motion in fluids or plasmas-one is a Benard convection (or streamer) and the other is a zonal flow-have been compared by introducing a thermodynamic phenomenological model and evaluating the corresponding entropy production rates (EP). These two systems have different topologies in their equivalent circuits: the Benard convection is modeled by parallel connection of linear and nonlinear conductances, while the zonal flow is modeled by series connection. The "power supply" that drives the systems is also a determinant of operating modes. When the energy flux is a control parameter (as in usual plasma experiments), the driver is modeled by a constant-current power supply, and when the temperature difference between two separate boundaries is controlled (as in usual computational studies), the driver is modeled by a constant-voltage power supply. The parallel (series)-connection system tends to minimize (maximize) the total EP when a constant-current power supply drives the system. This minimum/maximum relation flips when a constant-voltage power supply is connected. (c) 2012 American Institute of Physics. [doi:10.1063/1.3675854]