Work Package 2

WP2: Canonical grid-generated and wall-bounded turbulence

Group lead:  Professor Neil Sandham

Affiliated staff:  Dr Yongmann Chung, Prof Shuisheng He, Prof Michael Leschziner, Dr George Papadakis, Prof Mark Savill, Prof Christos Vassilicos

This work package focuses on studies of fully developed incompressible turbulence in simplified configurations to understand how realistic turbulent flows can be manipulated by changes in boundary conditions.  These include turbulence-generating grids or wall-bounded domains with flow control or surface roughness.

Research projects

Vassilicos, J.C., Low and high frequency modifications to the attached eddy hypothesis

Leschziner, M.A. and Agostini, L., Predicting the response of small-scale near-wall turbulence to large scale outer motions

Paul, I., Papadakis, G. and Vassilicos, J.C., Alignments and small scale statistics in the production region of grid turbulence

Bechlars, P. and Sandberg, R.D., Characterisation of turbulence in a turbulent boundary layer

Yang, Q. and Chung, Y., Influence of VLSMs in drag reduction by streamwise travelling wave of spanwise wall velocity

Naqavi, I.Z., Tyacke, J.C. and Tucker, P.G., Direct numerical simulation of a plane wall jet

Laizet, S. and Diaz Daniel, C., Direct numerical simulation of the interaction of a wall-mounted cube with a turbulent boundary layer

Khosh Aghdam, S., Ricco, P. and Seddighi, M., Turbulent flows over shear-dependent slip length superhydrophobic surfaces

Alves Portela, F., Papadakis, G. and Vassilicos, J.C., Numerical simulation of a turbulent wake behind a square section cylinder

Mason, J, The structure of MHD turbulence

Wang, Z and Chung, Y., Direct numerical simulation of temporally accelerating turbulent pipe flow

Thakkar, Busse, Sandham: Direct numerical simulation of an irregular rough surface from the hydraulically smooth to the fully-rough regime

Ghebali, Chernyshenko, Leschziner: Turbulent drag reduction by wavy surfaces

Wang, Chung: Direct numerical simulation of a turbulent curved pipe flow.

Bechlars, Sandberg: The key role of pressure in the turbulence cascading process

Busse, Schluter: Influence of a Thomson-Troian slip boundary condition on turbulent channel flow

Yasuda, Vassilicos: Large-range memory and therefore inhomogeneity in periodic turbulence

Hwang: The mesolayer of attached eddies in high-Reynolds-number turbulent channel flow

Zhou, Vassilicos: Turbulent/Non-turbulent interfaces in turbulent axisymmetric wakes

Brauner, Laizet: High-Fidelity simulations of dielectric barrier discharge plasma actuators in a turbulent channel flow

de Giovanetti, Hwang, Choi: Coherent structures and skin friction in a turbulent channel flow

Ioannou, Margnat, Laizet: High-Fidelity simulations of incompressible turbulent jets at high Reynolds numbers

Paul, Papadakis, Vassilicos: Spatial evolution of the statistics of passive scalar fluctuations behind a single square grid

Seddighi, He: A study of turbulent-turbulent transient flow in a transitionally rough regime

Wu, Laurence, Afghan: Dynamic Mode Decomposition of Jet in Channel Crossflow

Castagna, Yao: On the effect of the distance between longitudinally ridged walls in a turbulent channel flow

Sirilapanan, Wang, Chung: Active control of turbulent channel flow for drag reduction using periodic blowing jets

Rolfo, Moulinec, Emerson: Wall resolved LES of a simplified HVAC duct

Ahmed, Afgan, Apsley, Stallard, Stansby : Turbulent length scales and stress in open channel flows at different Reynolds numbers



Video of Channel flow simulation using a combined LES-QDNS approach