R. RUDRABHI RAMU, B. AKHIL, K. LEELA KUMAR, Y. PHANEENDRA,. 2021. “DESIGN AND SIMULATION OF COUNTER FLOW HEAT EXCHANGER USING HELICAL FLOW DUCTS”. Design Engineering, July, 4280-88. http://www.thedesignengineering.com/index.php/DE/article/view/2876.