Effect of Duct Extension on Velocity Profile in a Multi-Tube Electrostatic PrecipitatorNikola Čajová Kantová, Alexander Backa, Peter Hrabovský, Alexander Čaja and Michal HolubčíkMATEC Web Conf., 412 (2025) 05002DOI: https://doi.org/10.1051/matecconf/202541205002