Numerical investigation on Double Tube Counter Flow Heat ExchangerRavi Shankar Raman, Swathi B, Alekhya V, Shrikant Zade, Ashwani Kumar, Sonali Jayronia and Laith H. AlzubaidiE3S Web of Conf., 507 (2024) 01027DOI: https://doi.org/10.1051/e3sconf/202450701027