108 citations · 352 across the 7 of their papers we have counts for
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Turbulent flow over transitionally rough surfaces with varying roughness densities
M. MacDonald, L. Chan, D. Chung +2
We investigate rough-wall turbulent flows through direct numerical simulations of flow over three-dimensional transitionally rough sinusoidal surfaces. The roughness Reynolds numbe…
Direct Numerical Simulation of the Moist Stably Stratified Surface Layer: Turbulence and Fog Formation
Michael MacDonald, Marcin J. Kurowski, João Teixeira
We investigate the effects of condensation and liquid water loading on the stably stratified surface layer, with an eye towards understanding the influence of turbulent mixing on f…
Direct numerical simulation of high aspect ratio spanwise-aligned bars
M. MacDonald, A. Ooi, R. García-Mayoral +2
We conduct minimal-channel direct numerical simulations of turbulent flow over two-dimensional rectangular bars aligned in the spanwise direction. This roughness has been often des…
Heat transfer in rough-wall turbulent thermal convection in the ultimate regime
Michael MacDonald, Nicholas Hutchins, Detlef Lohse +1
Heat and momentum transfer in wall-bounded turbulent flow, coupled with the effects of wall-roughness, is one of the outstanding questions in turbulence research. In the standard R…
Roughness effects in turbulent forced convection
M. MacDonald, N. Hutchins, D. Chung
We conducted direct numerical simulations (DNSs) of turbulent flow over three-dimensional sinusoidal roughness in a channel. A passive scalar is present in the flow with Prandtl nu…
The minimal-span channel for rough-wall turbulent flows
M. MacDonald, D. Chung, N. Hutchins +3
Roughness predominantly alters the near-wall region of turbulent flow while the outer layer remains similar. This makes it a prime candidate for the minimal-span channel, which onl…