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A constraint for the subgrid-scale stresses in the logarithmic region of high Reynolds number turbulent boundary layers: A solution to the log-layer mismatch problem KU Leuven
This paper addresses one of the most persisting problems in wall-modeled large eddy simulation (LES): the overshoot of the mean velocity gradient near the wall, often referred to as the “log-layer mismatch” problem. An analysis of the relationship between turbulent kinetic energy budgets and mean velocity gradient is elaborated for both direct numerical simulations and LES of fully developed channel flow at high Reynolds number. Based on the ...
Directed Self-Assembly of Spheres into a Two-Dimensional Colloidal Crystal by Viscoelastic Stresses KU Leuven
Ordering induced by shear now can be Used to direct the assembly of particles in Suspensions. Flow-induced ordering is determined by the balance between a range of forces, such as direct interparticle, Brownian, and hydrodynamic forces. The latter are modified when dealing with viscoelastic rather than Newtonian matrices. In particular, 1D stringlike structures of spherical particles have been observed to form along the flow direction in shear ...
13C labeling unravels carbon dynamics in banana between mother plant, sucker and corm under drought stress KU Leuven
Banana is a perennial crop and typically consists of a mother plant and one or more suckers that will serve as the next generation. Suckers are photosynthetically active, but also receive photo-assimilates from the mother plant. While drought stress is the most important abiotic constraint to banana cultivation, its effect on suckers or banana mats as a whole remains unknown. To investigate whether parental support to suckers is altered under ...
Impact of competitive flow on wall shear stress in coronary surgery: computational fluid dynamics of a LIMA-LAD model Universiteit Gent
Quantification of the Heterogeneous Heat Stress Response of E. coli (Kwantitatieve studie van de microbiële dynamica van E. coli in omstandigheden van hoge temperatuurstress) KU Leuven
Nowadays, the tendency towards milder processing conditions in food industry in order to retain the desirable sensory and nutrient characteristics can lead to adapted pathogens and spoilage micro-organisms that resist the processing conditions presumed to be lethal. Microorganisms can adapt to stress by different mechanisms such as production of protecting factors or increased heterogeneity by phenotypic means or by mutation. The specific aim of ...
Protein Methionine Sulfoxide Dynamics in Arabidopsis thaliana under Oxidative Stress KU Leuven Vrije Universiteit Brussel Universiteit Gent
Reactive oxygen species such as hydrogen peroxide can modify proteins via direct oxidation of their sulfur-containing amino acids, cysteine and methionine. Methionine oxidation, studied here, is a reversible posttranslational modification that is emerging as a mechanism by which proteins perceive oxidative stress and function in redox signaling. Identification of proteins with oxidized methionines is the first prerequisite toward understanding ...
Developmental stress and telomere dynamics in a genetically polymorphic species Universiteit Antwerpen
A central objective of evolutionary biology is understanding variation in life-history trajectories and the rate of aging, or senescence. Senescence can be affected by trade-offs and behavioural strategies in adults but may also be affected by developmental stress. Developmental stress can accelerate telomere degradation, with long-term longevity and fitness consequences. Little is known regarding whether variation in developmental stress and ...
Elevated reproduction does not affect telomere dynamics and oxidative stress Universiteit Antwerpen
Oxidative stress and telomere dynamics are considered to be powerful biomarkers quantifying a potential trade-off between current reproduction and self-maintenance. Recent studies confirmed the negative impact of elevated reproduction on telomeres, but the evidence for the cost of reproduction in terms of oxidative stress remains equivocal. In order to induce reproductive costs, we experimentally manipulated reproductive effort by increasing ...
Drought stress in banana - assessment tools and underlying carbon dynamics KU Leuven
Banana (Musa sp.) is an important food and cash crop around the world. Drought is an important limitation to yield and drought spells are becoming more frequent due to climate change. Plant's resilience towards drought can be improved through the use of drought-resistant varieties or by implementing alternative cultivation methods, but the evaluation of such varieties and practices is hindered by a lack of drought stress evaluation tools. It is ...