Classification of Fine Particles Using the Hydrodynamic Forces in the Boundary Layer of a Membrane

The Finnish Society of Indoor Air Quality and Climate (FiSIAQ) introduced a Classification of Indoor Climate, Construction Cleanliness, and Finishing Materials in 1995. The Classification of Indoor Climate has been revised to meet the new Decree on indoor air quality and ventilation, European standards and experience from users of the classification. The most significant change is that target values for concentration and the in/out ratio of fine particles have been added. Other adjustments have been made to ensure good indoor environment and energy efficiency, but with reasonable investments. The criteria for emissions from building material and furniture were also updated. The Building Information Foundation RTS sr has run the M1-labelling of building products since 1996. The voluntary approach has been proven to improve the IAQ in new buildings and to reduce emissions from building materials. The Classification of Indoor Environment 2018 is integrated part of the new RTS Environmental Classification system.

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The classification of pollutants and their pathways in the atmosphere

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences ◽

10.1098/rsta.1979.0007 ◽

1979 ◽

Vol 290 (1376) ◽

pp. 469-476 ◽

Cited By ~ 2

Keyword(s):

Boundary Layer ◽

Human Life ◽

Biogeochemical Cycles ◽

Climatic Conditions ◽

Atmospheric Pollutants ◽

Relative Importance ◽

Natural Sources ◽

Living Organisms ◽

Broad Classification

Atmospheric pollutants may damage, directly or indirectly, human life and health, other living organisms and complete ecosystems, human artefacts, and climatic conditions. The development of appropriate policies and methods for control of pollution requires, inter alia , an assessment of the routes taken by pollutants or their precursors through the atmosphere. Consideration of these routes leads to a broad classification on a local, regional or global basis associated mainly, but not exclusively, with the terrestrial boundary layer, with the troposphere and with the stratosphere respectively. This may require in some cases the perspective of total biogeochemical cycles, and in any event of the relative importance of man-made and natural sources of materials to be regarded as pollutants.

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Group classification of three-dimensional boundary layer equations of a class of non-Newtonian fluids

Applied Mathematics and Computation ◽

10.1016/j.amc.2003.08.075 ◽

2004 ◽

Vol 157 (3) ◽

pp. 849-859 ◽

Cited By ~ 2

Author(s):

Muhammet Yürüsoy

Keyword(s):

Boundary Layer ◽

Three Dimensional ◽

Group Classification ◽

Newtonian Fluids ◽

Boundary Layer Equations ◽

Dimensional Boundary

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A Theory for Fine Particle Deposition in Two-Dimensional Boundary Layer Flows and Application to Gas Turbines

Journal of Engineering for Power ◽

10.1115/1.3227268 ◽

1982 ◽

Vol 104 (1) ◽

pp. 69-76 ◽

Cited By ~ 5

Author(s):

M. Mengu¨turk ◽

E. F. Sverdrup

Keyword(s):

Boundary Layer ◽

Gas Turbines ◽

Particle Deposition ◽

Fine Particles ◽

Magnitude Estimate ◽

Two Dimensional ◽

Boundary Layer Flows ◽

Order Of Magnitude ◽

Dimensional Boundary ◽

Layer Flow

A theory is presented to predict deposition rates of fine particles in two-dimensional compressible boundary layer flows. The mathematical model developed accounts for diffusion due to both molecular and turbulent fluctuations in the boundary layer flow. Particle inertia is taken into account in establishing the condition on particle flux near the surface. Gravitational settling and thermophoresis are not considered. The model assumes that the fraction of particles sticking upon arrival at the surface is known, and thus, treats it as a given parameter. The theory is compared with a number of pipe and cascade experiments, and a reasonable agreement is obtained. A detailed application of the model to a turbine is also presented. Various regimes of particle transport are identified, and the range of validity of the model is discussed. An order of magnitude estimate is obtained for the time the turbine stage can be operated without requiring cleaning.

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