Heat transfer in fluid and solid media and energy systems

目的：i）传热和流体力学问题的理论和实验研究，涉及封闭和开放腔体和流体层中的共轭传热（自然和混合对流，传导和辐射）。特别是，离散热源的最佳位置的确定与有限的厚度和传导性，以及在流体层中的生物对流和热-生物对流的不稳定性的外壳的墙壁。ii）研究可再生能源和新技术系统，并从热力学角度对其进行分析;特别是确定其性能和制氢的最佳设计条件。科学方法：i）传热-流体力学：1）我们将使用数值方法求解守恒方程（2）对于简单的情况，我们将用解析和数值方法求解守恒方程; 3）我们将使用线性和非线性稳定性分析来确定流动稳定性和分叉序列; 4）为了验证理论结果，我们将使用实验方法来研究问题的某些方面。（二）热力学研究：1）我们将使用分析方法来评估它们的性能，并确定最佳条件，以最大限度地发挥它们的性能，并提供设计工具。新奇和预期的意义：i）传热流体力学：应用于可再生能源技术，电子和能量存储系统，以及生物反应器。在许多应用中，设计人员仍然使用经验关系式，因为最佳设计条件、流动稳定性和分叉往往是未知的。我们的研究结果将为解决这些问题做出重要贡献。ii）热力学研究：可再生能源系统和新能源技术被确定为优先研究领域。通过分析和整合太阳能制氢方法中的新想法和解决方案，我们将能够为这些系统的改进做出贡献。

Objectives: i) The theoretical and experimental study of heat transfer and fluid mechanics problems involving conjugate heat transfer (natural and mixed convection, conduction and radiation) in closed and open cavities and fluid layers. In particular, determination of the optimum positions of discrete heat sources on enclosure walls with finite thickness and conductance, and instability in bioconvection and thermo-bioconvection in fluid layers. ii) The study of renewable energy and new technology systems and their analysis from the thermodynamics point of view; in particular, determination of their performance and optimum design conditions in hydrogen production.Scientific approach: i) Heat transfer-fluid mechanics: 1) we will solve the conservation equations using numerical methods (the finite difference - control volume methods); 2) we will solve the conservation equations for simple cases using analytical and numerical methods; 3) we will use linear and non-linear stability analyses to determine flow stability and bifurcation sequences; 4) to verify theoretical results, we will study certain aspects of the problems using experimental methods. ii) Thermodynamic studies: 1) we will use the exergy analysis method to evaluate their performance and to determine optimum conditions to maximize their performance and to provide design tools.Novelty and expected significance: i) Heat transfer-fluid mechanics: The applications are in renewable energy technologies, in electronic and energy storage systems, and in bio-reactors. In many applications, designers still use empirical relations since the optimum design conditions, stability of flow and bifurcation often are not known. Our results will be important contributions addressing these issues. ii) Thermodynamic studies: The renewable energy systems and the new energy technologies are identified as priority research areas. By analyzing and incorporating new ideas and solutions in solar - hydrogen production methods, we will be able to contribute towards the improvement of these systems.