1a.Thermal systems is a very broad field involving many separate fields of engineering. 1b.Thermal systems is an interdisciplinary field which involves the traditional disciplines of thermodynamics(热力学)， heat transfer,fluid mechanics,mass transfer(质量传递)，and chemical kinetics(化学动力学).n 1a. Thermal systems is a very broad field involving many separate fields of engineering. n 1b. Thermal systems is an interdisciplinary field which involves the traditional disciplines of thermodynamics（热力学）, heat transfer, fluid mechanics, mass transfer（质量传递）, and chemical kinetics（化学动力学）