Results 241 to 250 of about 13,688,735 (296)
Some of the next articles are maybe not open access.
Application of the diffusion method for preparing test gas mixtures
Measurement Techniques, 19681. Diffusion dispensers can be used in producing testing instruments for obtaining given vapor concentrations in air. It is advantageous to use a dispenser with a porous membrane, thus making it possible to cover the entire range of concentrations required for testing working instruments.
D. K. Kollerov, K. D. Mgaloblishvili
openaire +1 more source
A Zonal Calculation Method for Axial Gas Turbine Diffusers
Volume 6B: Turbomachinery, 2013The axial exhaust downstream of a gas turbine in a combined cycle plant includes an annular diffuser with struts and a closed hub carrying the turbine rotor bearing. Flow separation occurs at the blunt end of the hub and can also occur on the casing wall and on the struts. A zonal method for the computation of the flow in such diffusers is described. A
A. Hirschmann, M. Casey, M. Montgomery
openaire +1 more source
A Closed Tube Method for Measuring Gas Diffusion Coefficients
Soil Science Society of America Journal, 1988Abstract A transient, closed tube method for measuring both ordinary gas diffusivities and porous media effective diffusivities is presented. The current method is suitable for measuring gas diffusivities in air‐dry systems over a range of temperatures.
T. K. Tokunaga, L. J. Waldron, J. Nemson
openaire +1 more source
A Modified Method for the In Situ Measurement of Soil Gas Diffusivity
Soil Science Society of America Journal, 2011Gas diffusion coefficients are of importance for the calculation of gas fluxes in soils. Since many aspects of soil gas fluxes are affected by scale variability of soil properties, diffusion coefficients should be measured in situ and preferably for a large volume. In the present study, we modified the method of McIntyre and Philip.
Andreas Schwen +5 more
openaire +1 more source
A method of resolving streaming and diffuse components of gas flow
Vacuum, 1968Abstract Streaming and randomized flows of molecules entering a gauge envelope can be separated by the use of a time resolved flow and detection system. This paper describes such a system and the results obtained.
JR Coupland, DP Hammond
openaire +1 more source
Further Development and Studies of Gas Methods in Matrix Diffusion
MRS Proceedings, 1993ABSTRACTThe present status of the recently introduced gas method equipment for migration studies of fractured and porous media is briefly reviewed together with advances in the experimental techniques. The conditions under which matrix diffusion can be observed in both gas flow and water flow experiments are discussed in some detail.
Kari Hartikainen +3 more
openaire +1 more source