Role of Diffusion Boundary Layer in Contact Inhibition of Growth

Nature ◽  
1973 ◽  
Vol 246 (5430) ◽  
pp. 200-203 ◽  
Author(s):  
M. G. P. STOKER
Keyword(s):  
Boundary Layer ◽  
Contact Inhibition ◽  
Diffusion Boundary Layer ◽  
Diffusion Boundary ◽  
Inhibition Of Growth

DIFFUSION BOUNDARY LAYER TRANSPORT IN GRACILARIA CONFERTA(RHODOPHYTA)1

1995 ◽  
Vol 31 (5) ◽  
pp. 768-773 ◽  
Author(s):  
Yael Gonen ◽  
Eitan Kimmel ◽  
Michael Friedlander
Keyword(s):  
Boundary Layer ◽  
Diffusion Boundary Layer ◽  
Diffusion Boundary ◽  
Gracilaria Conferta

Numerical Modeling of Diffusion Boundary Layer in Strip Casting Process of Carbon Steel

2000 ◽  
Author(s):  
A. V. Kuznetsov
Keyword(s):  
Boundary Layer ◽  
Carbon Steel ◽  
Continuous Casting ◽  
Casting Process ◽  
Strip Casting ◽  
Diffusion Boundary Layer ◽  
Valuable Insight ◽  
Continuous Casting Process ◽  
Diffusion Boundary ◽  
Flat Steel

Abstract This paper is aimed at the investigation of the diffusion boundary layer near the cooled casting surface encountered in the horizontal continuous casting process of carbon steel. The strip casting process is a relatively new continuous casting process. This process makes it possible to produce high-quality flat steel products directly, without using hot rolling. This explains why this process is very attractive for industry. Extensive numerical simulations under equilibrium and nonequilibrium assumptions provide valuable insight into the physics of diffusion boundary layer.

Interactions between Nanoparticles and Polymers in the Diffusion Boundary Layer during Freezing Colloidal Suspensions

Langmuir ◽  
2019 ◽  
Vol 35 (32) ◽  
pp. 10446-10452
Author(s):  
Jiaxue You ◽  
Jincheng Wang ◽  
Lilin Wang ◽  
Zhijun Wang ◽  
Junjie Li ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Colloidal Suspensions ◽  
Diffusion Boundary Layer ◽  
Diffusion Boundary

Positive interactions between moss cushions and vascular plant cover improve water economy on Öland’s alvar, Sweden

Botany ◽  
2015 ◽  
Vol 93 (3) ◽  
pp. 141-150 ◽  
Author(s):  
Kaj Sand-Jensen ◽  
Kathrine Jul Hammer ◽  
Mikkel Madsen-Østerbye ◽  
Tim Dencker ◽  
Theis Kragh
Keyword(s):  
Boundary Layer ◽  
Wind Speed ◽  
Vascular Plant ◽  
Plant Cover ◽  
Diffusion Boundary Layer ◽  
Positive Interactions ◽  
Near Surface ◽  
Diffusion Boundary ◽  
Water Economy ◽  
Water Vapour Concentration

Dense moss cushions colonize bare limestone pavements on Öland’s alvar, southeastern Sweden. As these cushions grow larger and thicker and can store more water, they should physically protect and facilitate their own performance as well as the colonization by vascular plants. We tested these predictions by measuring the airflow and water economy of moss cushions. We found that cushions are imbedded in boundary layers formed by ground and moss surfaces. Near-surface flow was reduced immediately upwind and negligible downwind of the moss cushions, which should facilitate their centrifugal expansion. The calculated diffusion boundary layer was thin (<0.7 mm) above moss cushions exposed to free airflow of 1–6 m·s−1 in accordance with substantial turbulence measured by small sensors at 0.5 cm distance from moss surfaces. Evaporation from the wetted cushions increased linearly with wind speed (0 and 8 m·s−1) in wind-tunnel experiments, and neither evaporation nor airflow followed standard formulas for objects in free flow. Higher wind speed reduced the diffusion boundary layer and simultaneously cooled the moss surface, thereby reducing the drop in water vapour concentration from moss surfaces to air. As desiccation of cushions progressed during three dry summer days, the profound decline of evaporation rate with cushion size gradually became positive when only large cushions still contained water. Water economy in relation to cushion size predicted that rehydrated large cushions retained photosynthesis for 80% and small cushions for only 50% of the time. A cover of the succulent plant Sedum album L. reduced sun and wind exposure and water loss from the moss surface. Sedum remained hydrated after mosses had dried out. Moss cushions and Sedum can, therefore, mutually benefit from each other’s water economy.

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