CFD Analysis of Intake Air Swirl Effects on Combustion Efficiency and Emission Reduction in Direct Injection Diesel EnginesK. Udhayakumar, S. Purushothaman, M.S. Ravi theja, S. Premnath, D. Karunakaran, S. Ajith Arul Daniel, S. Venugopal, R. Sridhar and S. BaskarEPJ Web Conf., 363 (2026) 01001DOI: https://doi.org/10.1051/epjconf/202636301001