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| 1 | Progress in study on constructal theory and its applications显示文摘The emergence and development of constructal theory,which has been a new discipline branch to research sorts of structures in nature and engineering,are reviewed.The core of the constructal theory is that various shapes and structures of the matters in nature are generated from the tendency to obtain optimal performance.Constructal theory and its application are summarized,from disciplines such as heat,mechanism,fluid flow,electricity,magnetism and chemistry,to life and non-life systems in nature. | CHEN LinGen | 2012 | Science China(Technological Sciences)2012，55，3： | 47 |
| 2 | 管内对流换热的场协同分析及换热强化显示文摘导出管内湍流换热Nu与局域时均参数的关系式,将对流换热的场协同理论扩展至湍流换热。分析了管内对流换热的特点,并根据场协同理论提出强化湍流换热的方法,发展了一种新型强化换热管一交叉椭圆管,既适合于层流换热强化也适合于湍流换热强化,其强化传热效果显著而流阻较小。 | 孟继安 陈泽敬 李志信 过增元 | 2003 | 工程热物理学报2003，24，4： | 45 |
| 3 | Constructal optimization for geometry of cavity by taking entransy dissipation minimization as objective显示文摘The entransy dissipation extremum principle provides new warranty and criterion for optimization of heat transfer.For two cases(body with heat generation and body heated externally)of a solid conducting wall with an open cavity,a dimensionless equivalent thermal resistance based on entransy dissipation definition was taken as the optimization objective to optimize the model constructal ge- ometry.Numerical results validated the necessity and feasibility of the presented method.Comparisons of the numerical results based on minimization of dimensionless maximum thermal resistance and minimization of dimensionless equivalent thermal resistance,respectively,showed that there was no obvious difference between the two results when the volume fractionΦoccupied by cavity was small, but the difference between the two results increased with the increases ofΦand the body aspect ratio H/L for any model.The optimal cavities for bodies heated externally were more slender than those for bodies with heat generation.Heat origin had obvious effect on the global performance of heat transfer. The entransy dissipation of body heated externally increased 2―3 times than that of body with heat generation,indicating that the global performance of heat transfer weakened.The method presented herein provides some guidelines for some relevant thermal design problems. | XIE ZhiHui CHEN LinGen SUN FengRui | 2009 | Science China(Technological Sciences)2009，52，12： | 37 |
| 4 | 层流对流换热中的势容耗散极值与最小熵产显示文摘在一定的约束条件下,存在一个最优的速度场,它能够使得温度场和速度场的协同程度最好,从而使得对流换热的整体传热性能达到最优。目前对传热效果的评价存在熵产最小化和势容耗散取得极值两种不同的准测。分别根据这两种优化准则,用变分方法推导了在粘性耗散一定的条件下,稳态无内热源的层流对流换热的场协同方程,并对方腔内对流换热问题进行了优化。数值计算结果表明,势容耗散取得极值时的换热效果优于熵产最小的结果,因此势容耗散极值原理更适合做为对流换热的优化准则。 | 吴晶 程新广 孟继安 过增元 | 2006 | 工程热物理学报2006，27，1： | 37 |
| 5 | Progress in optimization of mass transfer processes based on mass entransy dissipation extremum principle显示文摘The mass entransy and its dissipation extremum principle have opened up a new direction for the mass transfer optimization. Firstly, the emergence and development process of both the mass entransy and its dissipation extremum principle are reviewed. Secondly, the combination of the mass entransy dissipation extremum principle and the finite-time thermodynamics for optimizing the mass transfer processes of one-way isothermal mass transfer, two-way isothermal equimolar mass transfer, and isothermal throttling and isothermal crystallization are summarized. Thirdly, the combination of the mass entransy dissipation extremum principle and the constructal theory for optimizing the mass transfer processes of disc-to-point and volume-to-point problems are summarized. The scientific features of the mass entransy dissipation extremum principle are emphasized. | CHEN Lin Gen | 2014 | Science China(Technological Sciences)2014，57，12： | 34 |
| 6 | Constructal multidisciplinary optimization of electromagnet based on entransy dissipation minimization显示文摘Based on entransy dissipation, the mean temperature difference of solenoid (electromagnet) with high thermal conductivity material inserted is deduced, which can be taken as the fundament for heat transfer optimization using the extremum principle of entransy dissipation. Then, the electromagnet working at steady state (constant magnetic field, constant heat generating rate per unit volume) is optimized for entransy dissipation minimization (i.e. mean temperature difference minimization) with and without volume constraint. Besides, the effect of high thermal conductivity material on the magnetic field is analyzed, and the minimum mean temperature versus volume and magnetic induction characteristic are also studied. | WEI ShuHuan CHEN LinGen SUN FengRui | 2009 | Science China(Technological Sciences)2009，52，10： | 29 |
| 7 | 折流板换热器的数值模拟及场协同分析显示文摘在PHOENICS—3 .5 .1程序的基础上, 采用多孔介质模型, 以及体积多孔度、表面渗透度和各向异性的分布阻力来处理换热器内的管束; 用分布热源考虑管侧流体对壳侧流体的影响,对单弓形折流板换热器的壳程流场和温度场做了数值模拟。结果表明: (1) 采用换热器三维流动计算模型和k—ε湍流模型能较好地模拟折流板换热器内的流场分布; (2) 通过数值模拟可直观地了解换热器内的流动状态, 确定换热器的高、低速区和旋涡区。低速区和旋涡区换热效果差,管子易结垢, 而高速区换热效率高, 但管子易被冲蚀, 且阻力较大, 应予改进; (3) 换热器中间段的场协同性较好, 出入口处的场协同性较差, 应尽量减小其结构尺寸, 或采用导流筒式结构。 | 严良文 王志文 | 2005 | 石油机械2005，33，4： | 29 |
| 8 | 中国能源状况与发展对策显示文摘讨论了世界能源结构和中国能源结构的特点,阐明了中国能源结构中以煤炭为主的能源格局在未来中国能源政策制定方面的制约作用。通过分析我国总能源消耗中的分部门情况,指出钢铁、化工等重工业部门存在着耗能比例大、能量利用率低的问题。最后,对两类切实可行的节能方法,即低温余热利用和热能高效传递与转换技术进行了讨论。 | 苑中显 | 2005 | 中国冶金2005，15，5： | 28 |
| 9 | Constructal optimization on T-shaped cavity based on entransy dissipation minimization显示文摘The entransy dissipation extremum principle provides new warranty and criterion for optimization of heat transfer. For a heat transfer model of a rectangular solid wall with an open T-shaped cavity, a dimensionless equivalent thermal resistance based on entransy dissipation is taken as optimization objective, and constructal optimization for the model is carried out when the system volume, the cavity volume and the volume of rectangle occupied by T-shaped cavity are fixed. Numerical results indicate that the optimal geometry construct of cavity can be schemed out based on entransy dissipation extremum principle. The formulation of dimensionless global (maximum) thermal resistance presented in a literature is modified; some new rules which are different from those reported in the literature are obtained based on the minimization of the modified objective. Comparisons of the numerical results show that the optimal system constructs deduced respectively from the two thermal resistance objectives are very different. The optimization by taking equivalent thermal resistance minimization as objective can more effectively reduce mean temperature difference of heat transfer than the optimization by taking maximum thermal resistance minimization as objective, so that the performance of heat transfer for the total system can be improved. The more freedom the cavity has, the better the total system performance is. The correlations of the equivalent thermal resistance and the maximum thermal resistance of the system and three geometric degrees of freedom are found by using function fitting. | XIE ZhiHui CHEN LinGen SUN FengRui | 2009 | Chinese Science Bulletin2009，54，23： | 28 |
| 10 | Comparative study on constructal optimizations of T-shaped fin based on entransy dissipation rate minimization and maximum thermal resistance minimization显示文摘The constructal optimizations of T-shaped fin with two-dimensional heat transfer model are carried out by finite element method and taking the minimization of equivalent thermal resistance based on entransy dissipation and the minimization of maximum thermal resistance as optimization objectives, respectively. The effects of the global parameter a (integrating the coefficient of convective heat transfer, the overall area occupied by fin and its thermal conductivity) and the volume fraction ? of fin on the minimums of equivalent thermal resistance and maximum thermal resistance as well as their corresponding optimal configurations are analyzed. The comparison of the results based on the above two optimization objectives is conducted. The results show that the optimal structures based on the two optimization objectives are obviously different from each other. Compared with the optimization result by taking the minimization of maximum thermal resistance as the objective, the optimization result by taking the equivalent thermal resistance minimization as the objective can reduce the average temperature difference in the fin obviously. The increases of a and ? can all improve the working status of local hot spot and the global heat transfer performance of the system. But the improvement effects of the increases of a and ? on the minimization of equivalent thermal resistance are different from those on the minimization of maximum thermal resistance. For either objective, the effect of a is different from that of ?. The T-shaped fin with minimum equivalent thermal resistance is much taller than that with minimum maximum thermal resistance; for either optimization objective, the stem of fin is thicker than the branches of fin, and the stem thickness is relatively close to branch thickness when the minimization of equivalent thermal resistance is taken as the optimization objective. The T-shaped fin with flat stem and slender branches can benefit the reduction of the maximum thermal resistance. | XIE ZhiHui CHEN LinGen SUN FengRui | 2011 | Science China(Technological Sciences)2011，54，5： | 25 |
| 11 | Constructal design progress for eight types of heat sinks显示文摘This review paper summarizes constructal design progress performed by the authors for eight types of heat sinks with ten performance indexes being taken as the optimization objectives,respectively,by combining the methods of theoretical analysis and numerical calculation.The eight types of heat sinks are uniform height rectangular fin heat sink,non-uniform height rectangular fin heat sink,inline cylindrical pin-fin heat sink(ICPHS),plate single-row pin fin heat sink(PSRPHS),plate inline pin fin heat sink(PIPHS),plate staggered pin fin heat sink(PSPHS),single-layered microchannel heat sink(SLMCHS)with rectangular cross sections and double-layered microchannel heat sink(DLMCHS)with rectangular cross sections,respectively.And the ten performance indexes are heat transfer rate maximization,maximum thermal resistance minimization,minimization of equivalent thermal resistance which is defined based on the entransy dissipation rate(equivalent thermal resistance for short),field synergy number maximization,entropy generation rate minimization,operation cost minimization,thermo-economic function value minimization,pressure drop minimization,enhanced heat transfer factor maximization and efficiency evaluation criterion number maximization,respectively.The optimal constructs of the eight types of heat sinks with different constraints and based on the different optimization objectives are compared with each other.The results indicated that the optimal constructs mostly are different based on different optimization objectives under the same boundary condition.The optimization objective should be suitable chosen based on the focus when the constructal design for one heat sink is performed.The results obtained herein have some important theoretical significances and application values,and can provide scientific bases and theoretical guidelines for the thermal design of real heat sinks and their applications. | CHEN LinGen YANG AiBo FENG HuiJun GE YanLin XIA ShaoJun | 2020 | Science China(Technological Sciences)2020，63，6： | 25 |
| 12 | Constructal entransy dissipation rate minimization for umbrella-shaped assembly of cylindrical fins显示文摘Umbrella-shaped assembly of cylindrical fins is optimized by adopting analytical method and taking dimensionless mean thermal resistance (MTR) as performance index. The optimal construct of umbrella-shaped assembly is obtained. The results show that the heat conductance performance of the assembly becomes ever worse with ever greater number of elemental cylindrical fins,the umbrella-shaped assembly reduces to cylindrical fin in some values of design parameters,and the diameters’ dependence on design parameters is weak for the optimized assembly. An equivalent thermal resistance defined based on entransy dissipation rate (EDR) reflects an average heat transfer effect of the assembly. The constructal design corresponding to the minimum EDR (or MTR) should be adopted for designing an assembly of fins in engineering at the limit safe condition. | XIAO QingHua CHEN LinGen SUN FengRui | 2011 | Science China(Technological Sciences)2011，54，1： | 24 |
| 13 | 交叉缩放椭圆管换热与流阻实验研究及分析显示文摘对交叉缩放椭圆管进行了实验和数值研究,给出了换热和沿程阻力系数实验拟合关联式。交叉缩放椭圆管管内 截面交叉变化诱导产生强烈的二次流和纵向涡流,改善了速度场与温度场之间的协同关系。实验和数值模拟结果表明,交 叉缩放椭圆管管内的流动在Re≥500即表现为湍流,换热强化效果显著。 | 孟继安 陈泽敬 李志信 过增元 | 2004 | 工程热物理学报2004，25，5： | 22 |
| 14 | Constructal optimization of twice Y-shaped assemblies of fins by taking maximum thermal resistance minimization as objective显示文摘In this paper,constructal optimization of the twice Y-shaped assemblies of fins with six freedom degrees (characteristic parameters of geometry) is performed by employing finite element method and taking dimensionless maximum thermal resistance as a performance index,and the heat transfer performance of the twice Y-shaped assemblies of fins under various conditions with different freedom degrees are analyzed. The results show that the twice assemblies can improve the heat transfer performance of Y-shaped fin remarkably,and the minimum maximum thermal resistance of the twice Y-shaped assemblies of fins decreases by 36.37% compared with that of once Y-shaped assembly of fins. It is also proved again that the larger the number of freedom degrees for evolving is,the more perfect the system performance is. The effects of different characteristic parameters of geometry on the performance of the twice Y-shaped assemblies of fins are different,one should pay different attention to these parameters in practical engineering designs. The effects of two angles on the maximum thermal resistance are larger,but the optima of the two angles are robust. The effects of two height ratios on the maximum thermal resistance are more remarkable than those of two thickness ratios. | XIE ZhiHui, CHEN LinGen & SUN FengRui Postgraduate School, Naval University of Engineering, Wuhan 430033, China | 2010 | Science China(Technological Sciences)2010，53，10： | 21 |
| 15 | 流体低速绕流振动圆柱对流换热数值研究显示文摘运用Fluent的动态网格技术,对空气低速绕流振动圆柱的对流换热进行了研究,分析了流动和振动参数对换热的影响。数值计算表明,在本文计算范围内,壁面振动可使换热强化,最大可强化9倍,换热的强化随振幅和频率的增大而增大。场协同分析表明,圆柱振动强化换热的原因在于速度场和温度梯度场之间的协同程度得到了改善。 | 俞接成 李志信 邢程 | 2006 | 工程热物理学报2006，27，4： | 14 |
| 16 | 四叶片组合静态混合器湍流传热性能的数值模拟分析显示文摘采用Fluent计算软件对四叶片组合静态混合器内湍流换热进行数值模拟并与SK型静态混合器进行对比,结果表明,在104≤Re≤105范围内,前者的传热效率比后者提高约20%.运用场协同理论对结果进行了分析,新型静态混合器传热效率较高的主要原因为,在一个截面上有4个旋向与叶片旋向相同、旋涡半径近似等于叶片半径的纵向涡及4个旋向与叶片旋向相反、旋涡半径小于叶片半径的纵向涡,这些纵向涡能强化换热;与SK型静态混合器相比,新型静态混合器管内温度梯度基本相同,管内中心区二次流流速一定程度降低,而近壁区二次流流速差别较小,但速度场与热流场的协同程度得到明显改善. | 吴剑华 张静 张春梅 龚斌 | 2009 | 过程工程学报2009，9，1： | 13 |
| 17 | A novel method to improve the performance of heat exchanger——Temperature fields coordination of fluids显示文摘The methods to enhance the heat transfer in heat exchanger may be classified into two levels: one is to improve the heat transfer coefficient; the other is to upgrade the whole arrangement of the heat exchangers. For the second level, the performance of heat exchanger can be upgraded by increasing the coordination degree between the temperature fields of cold and hot fluids. When the temperature distributions are similar to each other, the temperature difference field (TDF) is more uniform, which means that the temperature fields are more coordinated with each other. For the cross-flow heat exchanger, rearrangement of the heat exchange surface area should improve the heat transfer effectiveness, which is even equal to that of the counter-flow heat exchanger when the surface area is reassigned optimally. For the multi-stream heat exchanger, the thermal performance is also dependent on the uniformity of the TDF, and the parallel-flow arrangement may achieve higher heat exchange effectiveness than the counter-flow arrangement, which indicates that the performance of heat exchanger depends on the coordination degree of temperature fields instead of the flow arrangement. | GUOZengyuan WEIShu CHENGXinguang | 2004 | Chinese Science Bulletin2004，49，1： | 13 |
| 18 | 层流场协同方程的验证及其性质显示文摘在粘性耗散一定的条件下,以热量传递势容耗散取得极值为优化目标,利用变分方法可以导出稳态层流对流换热的场协同方程。场协同方程的意义在于能够求解一定边界条件所对应的最佳速度场,从而实现最优的传热效果。本文采用二维方腔内空气的层流对流换热模型,通过将最佳速度场与其它流场的换热结果进行比较,初步验证了场协同方程的正确性,并对场协同方程的优化过程和原理进行了深入的分析。 | 苏欣 程新广 孟继安 过增元 | 2005 | 工程热物理学报2005，26，2： | 12 |
| 19 | Constructal entransy dissipation rate minimization for a heat generating volume cooled by forced convection显示文摘The geometry of a heat generating volume cooled by forced convection is optimized by applying the entransy dissipation extremum principle and constructal theory, while the optimal spacing between the adjacent tubes and the optimal diameter of each tube are obtained based on entransy dissipation rate minimization. The results of this work show that the optimal constructs based on entransy dissipation rate minimization and maximum temperature difference minimization, respectively, are clearly different. For the former, the porosity of the volume of channels allocated to the heat generating volume is 1/2; while for the latter, the larger the porosity is, the better the performance will be. The optimal construct of the former greatly decreases the mean thermal resistance and improves the global heat transfer performance of the system compared with the optimal construct of the latter. This is identical to the essential requirement of the entransy dissipation extremum principle that the required heat transfer temperature difference is minimal with the same heat transfer rate (the given amount of heat generated in the heat generating volume) based on the entransy dissipation extremum principle. | XIAO QingHua CHEN LinGen SUN FengRui | 2011 | Chinese Science Bulletin2011，56，27： | 12 |
| 20 | 环形内肋片圆管层流脉冲流动强化对流换热数值分析显示文摘为了解环形内肋片圆管中脉冲流动强化对流换热的机理,该文对这一现象进行了数值研究。数值计算结果表明:与具有相同Rem时的稳定流动相比,脉冲流动可使对流换热强化一倍以上,其强化效果与振荡频率、肋片高度和肋片间距有关;最佳量纲1振荡频率在400到1000之间,并随着Rem的增大而增加;对流换热强化的原因在于脉冲流动使由肋片引起的涡旋更加激烈,速度场和温度梯度场之间的协同性更好。 | 俞接成 李志信 | 2005 | 清华大学学报(自然科学版)2005，45，8： | 11 |
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