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101.
The excess electrical conductivity in thin tin films due to thermodynamic fluctuations above Tc has been measured as a function of temperature and sheet resistance Rns of films which varied from 0.2 Ω/? to 120 Ω/?. Results have been compared with the Aslamazov-Larkin, Maki-Thompson and Patton theories. It is found that among three the Maki-Thompson theory gives a better fit to experimental data. The pair breaking parameter a fitting parameter in the M-T theory, is found to behave linearly with Rns of films and is given by ? ? 9x10?3 + 1.02x10?2Rns for Rns ≤ 12 Ω/?. 相似文献
102.
R. K. Bhatnagar 《Proceedings Mathematical Sciences》1964,60(2):99-114
The flow generated by the rotation of a sphere in an infinitely extending fluid has recently been studied by Goldshtik. The corresponding problem for non-Newtonian Reiner-Rivlin fluids has been studied by Datta. Bhatnagar and Rajeswari have studied the secondary flow between two concentric spheres rotating about an axis in the non-Newtonian fluids. This last investigation was further generalised by Rajeswari to include the effects of small radial suction or injection. In Part A of the present investigation, we have studied the secondary flow generated by the slow rotation of a single sphere in non-Newtonian fluid obeying the Rivlin-Ericksen constitutive equation. In Part B, the effects of small suction or injection have been studied which is applied in an arbitrary direction at the surface of the sphere. In the absence of suction or injection, the secondary flow for small values of the visco-elastic parameter is similar to that of Newtonian fluids with inclusion of inertia terms in the Oseen approximation. If this parameter exceeds Kc = 18R/219, whereR is the Reynolds number, the breaking of the flow field takes place into two domains, in one of which the stream lines form closed loops. For still higher values of this parameter, the complete reversal of the sense of the flow takes place. When suction or injection is included, the breaking of the flow persists under certain condition investigated in this paper. When this condition is broken, the breaking of the flow is obliterated. 相似文献
103.
Prabhu L. Bhatnagar 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1966,17(5):646-649
Zusammenfassung Für eine laminar zwischen zwei parallelen Wänden strömende viskoelastische Flüssigkeit mit Stoffgleichung nachNoll wird der Wärmeübergang zwischen den Wänden für konstante bzw. linear veränderliche Wandtemperatur berechnet. 相似文献
104.
It has been observed that significant increases (~ 40%) in both the small-signal gain and laser efficiency occur when small, carefully controlled quantities of tripropylamine are added to the gas mixture of a TE CO2 laser. The results obtained are compared with the predictions of a detailed molecular kinetics model and are shown to be consistent with the proposal that doping helps to maintain the discharge uniformity at high energy loadings. With the small TE laser employed, the use of tripropylamine has enabled laser energy densities of ~ 47J 1-1 atm-1 to be achieved at a discharge efficiency of ~ 10% 相似文献
105.
The study of heat transfer in channel flow has been done by previous authors for Newtonian and elastico-viscous fluids. It is the aim of the present paper to study the temperature profile for flow of a micropolar fluid in a channel induced by a constant axial pressure gradient, when the walls are maintained at constant temperatures. We have examined the effects of microrotation on the temperature profile and on the kinetic energy of the fluid. Three cases have been chosen by us for detailed study: (i) both the walls are maintained at different constant temperatures, (ii) both the walls are maintained at the same constant temperature, (iii) one wall is kept at a constant temperature and there is no heat flux at the other wall. 相似文献
106.
107.
The paper discusses the performance characteristics of a Nd: glass laser system designed for laser produced plasma studies.
It consists of aQ-switched oscillator followed by two amplifier stages. The output behaviour of the oscillator, i.e. laser pulse duration,
peak power and optimum coupling, has been studied and is in good agreement with theory. Gain characteristics of amplifiers
were obtained as a function of various parameters. Energies in excess of 7 J with pulse durations as small as 18 nsec were
obtained giving rise to 400 MW peak power. 相似文献
108.
109.
110.
Abbott B Abdesselam A Abolins M Abramov V Acharya BS Adams DL Adams M Alves GA Amos N Anderson EW Baarmand MM Babintsev VV Babukhadia L Bacon TC Baden A Baldin B Balm PW Banerjee S Barberis E Baringer P Bartlett JF Bassler U Bauer D Bean A Begel M Belyaev A Beri SB Bernardi G Bertram I Besson A Beuselinck R Bezzubov VA Bhat PC Bhatnagar V Bhattacharjee M Blazey G Blessing S Boehnlein A Bojko NI Borcherding F Brandt A Breedon R Briskin G Brock R Brooijmans G Bross A Buchholz D Buehler M 《Physical review letters》2001,86(17):3712-3717
We apply a quasi-model-independent strategy ("Sleuth") to search for new high p(T) physics in approximately 100 pb(-1) of pp collisions at square root of (s) = 1.8 TeV collected by the D0 experiment during 1992-1996 at the Fermilab Tevatron. We systematically analyze many exclusive final states and demonstrate sensitivity to a variety of models predicting new phenomena at the electroweak scale. No evidence of new high p(T) physics is observed. 相似文献