Othman Ali, N.H., Admi, A.E., Osman, S.A. and Osman, S.A. 2025. Effect of Coolant Concentration Ratio on Surface Roughness in Machining Aluminium 6061: A Case Study. Journal of Advanced Research in Experimental Fluid Mechanics and Heat Transfer. 18, 1 (Jan. 2025), 55–68. DOI:https://doi.org/10.37934/arefmht.18.1.5568.