NOTE: Please cite 'Thakkar, M. , Busse, A., & Sandham, N.D. (2017) DNS of turbulent channel flow over a surrogate for Nikuradse-type roughness' in any publications that use this data. Dataset name: Dataset for 'DNS of turbulent channel flow over a surrogate for Nikuradse-type roughness' Dataset DOI: 10.5258/SOTON/D0266 Dataset files (top level directory): readme.txt, Table1.csv Dataset description: Table1.csv contains data from Table 1 in the paper. Additionally, it contains two more columns, showing the values of ks+ (equivalent sand-grain roughness height in wall-units) and Nikuradse's A parameter, for all cases considered. Data creator: i) Manan Thakkar, Aerodynamics and Flight Mechanics, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK. Associated investigators: i) Angela Busse, School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK. ii) Neil Sandham, Aerodynamics and Flight Mechanics, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK. Contact person: Manan Thakkar (M.Thakkar@soton.ac.uk, mananthakkar87@gmail.com). Related publications: Thakkar, M., Busse, A. & Sandham, N.D. (2017) DNS of turbulent channel flow over a surrogate for Nikuradse-type roughness. Data publisher: University of Southampton Dataset published: November 2017