Results 251 to 260 of about 180,663 (310)

The Transient Hot-Wire Technique: A Numerical Approach

International Journal of Thermophysics, 1998
The measurement of the thermal conductivity of a fluid by means of the transient hot-wire technique so far has made use of an analytical solution of the energy conservation equation for an ideal model, coupled with a set of approximate analytical corrections to account for small departures from the model. For this solution to be valid, constraints were
M. J. Assael, L. Karagiannidis, N. Malamataris, W. A. Wakeham   +3 more
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Silicon carbide alloys produced by hot wire, hot wire plasma-assisted and plasma-enhanced CVD techniques

Applied Surface Science, 2001
In this work, we report the optical and compositional properties of hydrogenated amorphous silicon carbide (a-SiC:H) thin films produced by plasma-enhanced chemical vapor deposition (PE-CVD), hot wire CVD (HW-CVD) and hot wire plasma-assisted CVD (HWPA-CVD) processes.
I. Ferreira, M.E.V. Costa, L. Pereira, E. Fortunato, R. Martins, A.R. Ramos, M.F. Silva   +6 more
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Composition and structure of silicon-carbide alloys obtained by hot wire and hot wire plasma assisted techniques

Vacuum, 2002
Abstract In this work we present results concerning the composition and structure of intrinsic thin film silicon carbide alloys obtained by hot wire and hot wire plasma assisted techniques using ethylene as carbon gas source. The data show that by increasing the percentage of ethylene in the gas mixture from 14% to 60% the optical band gap is ...
I Ferreira, A Cabrita, E Fortunato, R Martins   +3 more
openaire   +1 more source

A hot-wire measurement technique for complex turbulent flows

1st National Fluid Dynamics Conference, 1988
A hot-wire technique is described which can be used to measure all three components of the local mean velocity vector and all six components of the Reynolds stress tensor in a low-intensity turbulent flow which is arbitrarily skewed in pitch and yaw by as much as 30 degrees.
M. AL-BEIRUTTY, S. ARTERBERRY, F. GESSNER   +2 more
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Hot-Wire Technique for Droplet Measurements

1984
An instrument using hot-wire technology to measure droplet size distributions in the 1 to 450 µm size range is discussed. Such instrumentation has several advantages over present techniques which are dominated by a variety of laser light scattering approaches.
DS Mahler, DE Magnus
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Deposition of a-Si:H with the hot-wire technique

Journal of Non-Crystalline Solids, 1993
Amorphous hydrogenated silicon (a-Si:H) was deposited by SiH 4 decomposition on a bot tungsten filament. A substrate temperature of T s =400 o C was chosen since an improved degradation behaviour is expected is expected as a result of low hydrogen incorporation. The effects of gas pressure, substrate-to-filament distance d s-f and filamenttemperature
R. Zedlitz, F. Kessler, M. Heintze
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Advances on the hot wire technique

Journal of the European Ceramic Society, 2008
The hot wire technique is considered to be an effective and accurate means of determining the thermal conductivity of ceramic materials. However, specifically for materials of high thermal conductivity, the appropriate time interval to be considered in calculations is a decisive factor for getting accurate and consistent results.
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Microcrystalline silicon deposited by the hot-wire CVD technique

Materials Science and Engineering: B, 2000
Abstract Hot-wire chemical vapour deposition (HW-CVD) is a well-known technique to deposit amorphous silicon with high deposition rates from the decomposition of silane and hydrogen gases. By changing the hydrogen and silane flow rates, it is possible to observe a transition from amorphous silicon (a-Si:H) to microcrystalline silicon (μc-Si:H).
J Guillet, C Niikura, J.E Bourée, J.P Kleider, C Longeaud, R Brüggemann   +5 more
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Practical Advances on the Hot Wire Technique

Key Engineering Materials, 2008
In this work, a numerical simulation model is proposed with the purpose of determining the minimum and maximum measuring time for the hot wire parallel technique. An alternative experimental arrangement is also proposed for materials with thermal conductivity higher than 15W/mk. In this case, the experimental thermal transient is detected very close to
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A crossed hot-wire technique for complex turbulent flows

Experiments in Fluids, 1991
This paper describes a crossed hot-wire technique for the measurement of all components of mean velocity, Reynolds stresses, and triple products in a complex turbulent flow. The accuracy of various assumptions usually implicit in the use of crossed hot-wire anemometers is examined.
A. D. Cutler, P. Bradshaw
openaire   +1 more source