Engineering Research Center of BEEE;
Ministry of Education;
School of Energy and Environment;
Southeast University;
Nanjing 210096;
China;
Hefei Yidu Education Consulting Co.Ltd;
TAL Education Group;
Hefei 230031;
China;
Heat; transfer; Computational; fluid; dynamics; Convection; Helical; baffle; heat; exchangers; Sextant; helical; baffles;