TY - CHAP A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Egbers, Christoph ED - Czarske, Jürgen T1 - Experimentelle Untersuchung von Gebäude-integrierten Windführungen mit Laser-Doppler- Anemometrie T2 - Lasermethoden in der Strömungsmesstechnik, 23. Fachtagung, 8. - 10. September 2015, Dresden Y1 - 2015 SN - 978-3-9816764-1-9 SP - S. 64 PB - GALA CY - Karlsruhe ER - TY - CHAP A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Motuz, Vasyl A1 - Egbers, Christoph ED - Egbers, Christoph T1 - Experimental Investigation of Turbulent Structures and their Control in Boundary Layer Flow T2 - Experimentelle Strömungsmechanik, 24. Fachtagung 6.-8. September 2016 Cottbus Y1 - 2016 SN - 978-3-9816764-2-6 SP - S. 27 PB - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - CHAP A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Motuz, Vasyl A1 - Egbers, Christoph T1 - Influence of micro-blowing technique on skin friction of boundary layer flows T2 - 11th European Fluid Mechanics Conference, Sept. 12-16, 2016, Sevilla, Spain Y1 - 2016 UR - http://www.efmc11.org/download/com/com_0650_3H6SHY.pdf ER - TY - CHAP A1 - Hasanuzzaman, Gazi A1 - Motuz, Vasyl A1 - Merbold, Sebastian A1 - Egbers, Christoph A1 - Cuvier, Christophe A1 - Foucaut, Jean-Marc T1 - Turbulent boundary layer statistics under the influence of uniform micro-blowing T2 - 16th European Turbulence Conference, 21-24 August, 2017, Stockholm, Sweden Y1 - 2017 UR - http://www.delegia.com/app/data/8684/Abstract/29581/ETC16_Hasanuzzaman.pdf ER - TY - CHAP A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Motuz, Vasyl A1 - Egbers, Christoph A1 - Cuvier, Christophe A1 - Foucaut, Jean-Marc ED - Kähler, Christian J. ED - Hain, Rainer ED - Scharnowski, Sven ED - Fuchs, Thomas T1 - Experimental investigation of active control in turbulent boundary layer using uniform blowing T2 - Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018 Y1 - 2018 UR - https://doi.org/10.18726/2018_2 SN - 978-3-943207-32-3 SP - 180 EP - 185 PB - Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr CY - Neubiberg ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Cuvier, Christophe A1 - Motuz, Vasyl A1 - Foucaut, Jean-Marc A1 - Egbers, Christoph T1 - Experimental investigation of turbulent boundary layers at high Reynolds number with uniform blowing, part I: statistics T2 - Journal of Turbulence N2 - Uniform blowing in wall bounded shear flows is well known for its drag reducing effects and has long been investigated ever since. However, many contemporary and former research on this topic has confirmed the drag reducing effect but very less is known regarding how blowing is effecting the Reynolds stresses at high Reynolds number. Therefore, effect of uniform blowing has been experimentally investigated using Stereo Particle Image Velocimetry (SPIV) measurements in a zero pressure gradient turbulent boundary layer (TBL). The data presented in this literature covers a large range of high Reynolds number flow e.g. Reθ = 7500∼19763 where Reynolds number is based on the momentum thickness. Upstream blowing was varied from 1%∼6% of free stream velocity and measurements were taken downstream after a short interval. Logarithmic and outer region of the TBL was given special attention in terms of investigating statistics and turbulence properties. KW - Turbulent boundary layers KW - drag reduction KW - flow control KW - particle image velocimetry KW - uniform blowing Y1 - 2020 UR - https://www.tandfonline.com/doi/full/10.1080/14685248.2020.1740239 U6 - https://doi.org/10.1080/14685248.2020.1740239 SN - 1468-5248 N1 - European High-Performance Infrastructures in Turbulence (EuHIT, FP7-INFRASTRUCTURES-2012-1) IS - 3 SP - 129 EP - 165 ER - TY - THES A1 - Hasanuzzaman, Gazi T1 - Experimental investigation of turbulent boundary layer with uniform blowing at moderate and high Reynolds numbers N2 - Experimental investigation in turbulent boundary layer flows represents one of the canonical geometries of wall bounded shear flows. Utmost relevance of such experiments, however, is applied in the engineering applications in aerospace and marine industries. In particular, continuous effort is being imparted to explore the underlying physics of the flow in order to develop models for numerical tools and to achieve flow control. Within the scope of this Ph. D. topic, application of active control method such as micro-blowing effect in the incompressible, zero pressure gradient turbulent boundary layer was investigated. Turbulent boundary layer flow is particularly interesting as well as challenging due to the presence of different interacting scales which are increasingly becoming significant as the flow inertial conditions keeps growing. Therefore, energy content of the coherent structures in outer layer becomes stronger and necessitates measurements in relatively large Reynolds number. Present control experiments in turbulent boundary layer can be split into two different work segments, where one is objected towards the data measurements in turbulent boundary layer over smooth surface with and without any external perturbation. Here, perturbation is applied in the form of wall normal blowing while keeping the magnitude of blowing very low compared to the free stream velocity. For the subsequent results reported here, magnitude of blowing ratio was varied between 0%~6%. In the first part of the present thesis e.g. 0.415×10e+3≤Reτ≤1.160×10e+3, measurements were performed at the Brandenburg University of Technology wind tunnel. Non-intrusive Laser Doppler Anemometry was applied to carry out a series of measurements on a zero pressure gradient flat plate turbulent boundary layer. Blowing ratio through the perforated surface was varied between 0.17%~1.52% of the free stream velocity. To a maximum of 50% reduction in friction drag was achieved. For the measurements on the upper range of the stated Reynolds number, were conducted at the boundary layer wind tunnel. This boundary layer wind tunnel offers a spatially developed turbulent boundary layer over a flat plate within 2.2×10e+3≤Reτ≤5.5×10e+3 with an excellent spatial resolution. With the help of Stereo Particle Image Velocimetry technique, measurement of the velocity components were obtained covering entire boundary layer in streamwise wall normal plane. In addition, time resolved measurements were also obtained in spanwise and wall-normal plane in order to look into the morphology of turbulent structures immediately above the blowing area. KW - Turbulent boundary layers KW - Drag reduction KW - Flow control KW - Particle Image Velocimetry Y1 - 2021 U6 - https://doi.org/10.26127/BTUOpen-5566 PB - BTU CY - Cottbus-Senftenberg ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Motuz, Vasyl A1 - Egbers, Christoph T1 - Enhanced outer peaks in turbulent boundary layer using uniform blowing at moderate Reynolds number T2 - Journal of Turbulence Y1 - 2022 U6 - https://doi.org/10.1080/14685248.2021.2014058 SN - 1468-5248 VL - 23 IS - 1-2 SP - 68 EP - 95 ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Eivazi, Hamidreza A1 - Merbold, Sebastian A1 - Egbers, Christoph A1 - Vinuesa, Ricardo T1 - Enhancement of PIV measurements via physics-informed neural networks T2 - Measurement Science and Technology Y1 - 2022 UR - https://iopscience.iop.org/article/10.1088/1361-6501/aca9eb U6 - https://doi.org/10.1088/1361-6501/aca9eb SN - 1361-6501 ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Egbers, Christoph T1 - Flow control of a turbulent boundary layer using uniform blowing T2 - Progress in Turbulence X : Proceedings of the iTi Conference on Turbulence 2023 Y1 - 2024 SN - 978-3-031-55924-2 SN - 978-3-031-55923-5 U6 - https://doi.org/10.1007/978-3-031-55924-2_36 ER - TY - CHAP A1 - Merbold, Sebastian A1 - Hasanuzzaman, Gazi A1 - Buchwald, Tom A1 - Schunk, Christoph A1 - Schmeling, Daniel A1 - Volkmann, André A1 - Brinkema, Robert A1 - Hampel, Uwe A1 - Schröder, Andreas A1 - Egbers, Christoph ED - Cierpka, Christian T1 - Reference experiment for aerosol particle transport for dynamic situations T2 - Experimentelle Strömungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau T2 - Referenzexperiment zum Aerosolpartikel-Transport für dynamische Situationen Y1 - 2022 UR - https://www.gala-ev.org/images/Beitraege/Beitraege2022/pdf/09.pdf SN - 978-3-9816764-8-8 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER -