Laminar natural convection over a slender vertical frustum of a cone

The problem of laminar, natural convection flow over a slender frustum of a cone is treated in this paper. The governing differential equations are solved by a combination of quasi-linearization and finite-difference methods. Numerical solutions are obtained for Pr=0.7 and for a range of values of the transverse curvature parameter. It is shown that the effect of transverse curvature is of great significance in such flows. In diesem Bericht ist das Problem der laminaren natürlichen Konvektionsströmung an einem dünnen Kegelstumpf behandelt. Die maßgebliche Differentialgleichung ist durch eine Verbindung von Quasilinearisation und Differenzenverfahren gelöst. Eine numerische Lösung für Pr=0.7 wird für verschiedene Werte eines Krümmungsparameters angegeben. Es ist gezeigt, daß in solchen Strömungen dieser Krümmungsparameter eine große Bedeutung besitzt.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46649/1/231_2005_Article_BF01002323.pd

Laminar natural convection over a slender vertical frustrum of a cone with constant wall heat flux

The problem of laminar natural convection flow over a slender frustrum of a cone with constant wall heat flux is treated in this paper. The governing differential equations are solved by a combination of quasilinearization and finite-difference methods. Numerical solutions are obtained for Prandtl numbers from 0.1 to 100 for a range of values of transverse curvature parameter. It is found that the effect of transverse curvature is of great significance in such flows. In dieser Arbeit wird das Problem der laminaren, natürlichen Konvektionsströmung öber einem dünnen Kegelstumpf mit konstantem Wandwärmestrom behandelt. Die maßgeblichen Differentialgleichungen werden mit Hilfe einer Kombination von Quasilinearisierung und Differenzenverfahren gelöst. Numerische Lösungen werden für die Prandtl ' sehen Zahlen zwischen 0. l und 100 innerhalb eines Bereiches von Querkrüm mungswerten erhalten. Es wird gezeigt, daß der Einfluß der Querkrümmung in solchen Strömungen von großer Bedeutung ist.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46650/1/231_2005_Article_BF00997635.pd

Larval case architecture and implications of host-plant associations for North American Coleophora (Lepidoptera; Coleophoridae)

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Electrical Resistivity Under Extreme Conditions In The Ce 3ir4sn13 Heavy Fermion Compound

We have performed measurements of temperature dependent electrical resistivity ρ(T) under pressures up to 27 kbar and down to 0.1 K on single crystals of the Ce3Ir4Sn13 heavy fermion compound. At ambient pressure (P=0) we have identified in the ρ(T) data interesting features associated with the presence of crystalline field effects, magnetic correlations, Kondo single impurity scattering and, possibly, a low temperature structural phase transition. All these features were mapped as a function of pressure which allowed us to construct a pressure-temperature phase diagram with these temperature scales. We have also carried out measurements of ρ(T) as a function of magnetic fields up to H=8 T and the important temperature scales in ρ(T) were followed with field. Enlightened also by temperature dependent specific heat experiments we discuss the possible microscopic origins of the features found in our ρ(T) data. © 2013 Elsevier Ltd.177132135Remeika, J.P., Espinosa, G.P., Cooper, A.S., Barz, H., Rowell, J.M., McWhan, D.B., Vandenberg, J.M., Thomlinson, W., (1980) Solid State Commun., 34, p. 923Hodeau, J.L., Chenavas, J., Marezio, M., Remeika, J.P., (1980) Solid State Commun., 36, p. 839Agüero, O., (2007), Ph.D. thesis, Universidade Estadual de Campinas, Campinas, SP, BrazilZhong, G., Lei, X., Mao, J., (2009) Phys. Rev. B, 79, p. 094424Sato, H., Fukuhara, T., Iwasaki, S., Aoki, Y., Sakamoto, I., Takayanagi, S., Wada, N., (1993) Physica B, 186-188, p. 630Prires, M.A., Mendonça Ferreira, L., Duque, J.G.S., Urbano, R.R., Agüero, O., Torriani, I., Rettori, C., Pagliuso, P.G., (2006) J. Appl. Phys., 99, pp. 08J311Mendonça Ferreira, L., Bittar, E.M., Pires, M.A., Urbano, R.R., Agüero, O., Torriani, I., Rettori, C., Baggio-Saitovich, E., (2006) Physica B, 384, p. 332Mardegan, J.R.L., Aliouane, N., Coelho, L.N., Agüero, O., Bittar, E.M., Lang, J.C., Pagliuso, P.G., Giles, C., (2013) IEEE Trans. Magn., 49, p. 4652Hundley, M.F., Sarrao, J.L., Thompson, J.D., Movshovich, R., Jaime, M., Petrovic, C., Fisk, Z., (2002) Phys. Rev. B, 65, p. 024401Ghosh, K., Ramakrishnan, S., Chandra, G., (1993) Phys. Rev. B, 48, p. 10435Klintberg, L.E., Goh, S.K., Alireza, P.L., Saines, P.J., Tompsett, D.A., Logg, P.W., Yang, J., Grosche, F.M., (2012) Phys. Rev. Lett., 109, p. 237008Israel, C., Bittar, E.M., Aguero, O.E., Urbano, R.R., Rettori, C., Torriani, I., Pagliuso, P.G., Borges, H.A., (2005) Physica B, 359-361, p. 251Thomas, E.L., Lee, H.-O., Bankston, A.N., Maquilon, S., Klavins, P., Maldovan, M., Young, D.P., Chan, J.Y., (2006) J. Solid State Chem., 179, p. 1642Köhler, U., Pikul, A., Oeschler, N., Westerkamp, T., Strydom, A.M., Steglich, F., (2007) J. Phys. Condens. Matter, 19, p. 386207Ślebarski, A., White, B.D., Fijałkowski, M., Goraus, J., Hamlin, J.J., Maple, M.B., (2012) Phys. Rev. B, 86, p. 205113Takayanagi, S., Sato, H., Fukuhara, T., Wada, N., (1994) Physica B, 199-200, p. 49Nagoshi, C., Sugawara, H., Aoki, Y., Sakai, S., Kohgi, M., Sato, H., Onimaru, T., Sakakibara, T., (2005) Physica B, 359-361, p. 248Canfield, P.C., Fisk, Z., (1992) Philos. Mag. B, 65, p. 1117Yang, C.P., Chen, Y.H., Wang, H., Nagoshi, C., Kohgi, M., Sato, H., (2008) Appl. Phys. Lett., 92, p. 092504Bittar, E.M., (2006), M.Sc. thesis, Universidade Estadual de Campinas, Campinas, SP, BrazilCornut, D., Coqblin, B., (1972) Phys. Rev. B, 5, p. 4541Stewart, G.R., (1984) Rev. Mod. Phys., 56, p. 755Continentino, M.A., (2005) Braz. J. Phys., 35, p. 197Löhneysen, H.V., Rosch, A., Vojta, M., Wölfle, P., (2007) Rev. Mod. Phys., 79, p. 1015Christianson, A.D., Bauer, E.D., Lawrence, J.M., Riseborough, P.S., Moreno, N.O., Pagliuso, P.G., Sarrao, J.L., McQueeney, R.J., (2004) Phys. Rev. B, 70, p. 134505Collave, J.R., in pressChristianson, A.D., Goremychkin, E.A., Gardner, J.S., Kang, H.J., Chung, J.-H., Manuel, P., Thompson, J.D., Lawrence, J.M., (2008) Physica B, 403, p. 909Cornelius, A.L., Christianson, A.D., Lawrence, J.L., Fritsch, V., Bauer, E.D., Sarrao, J.L., Thompson, J.D., Pagliuso, P.G., (2006) Physica B, 378-380, p. 113Pagliuso, P.G., Moreno, N.O., Curro, N.J., Thompson, J.D., Hundley, M.F., Sarrao, J.L., Fisk, Z., Cornelius, A.L., (2002) Phys. Rev. B, 66, p. 054433Light, B.E., Kumar, R.S., Cornelius, A.L., Pagliuso, P.G., Sarrao, J.L., (2004) Phys. Rev. B, 69, p. 02441

Pressure-temperature-composition Phase Diagram Of Ce2 Min8 ( M = Rh, Ir )

In this work a preliminary pressure-temperature-composition phase diagram for the Ce2 Rh( 1 - x ) Irx In8 heavy-fermions (HF) materials is reported, built from pressure-dependent electrical resistivity ( ρ ( T ) ) measurements on single-crystalline samples. Although neither of the two end members is an ambient-pressure SC, a transition to a zero-resistance (ZR) state was found at ambient pressure ( TC ≈ 600 mK ) in a narrow Ir concentration range (around x = 0.5). Pressures not higher than 10 kbar are sufficient to suppress this ZR state for all measured concentrations, in contrast to the 115 materials. © 2006 Elsevier B.V. All rights reserved.378-380SPEC. ISS.423425Hegger, H., (2000) Phys. Rev. Lett., 84, p. 4986Petrovic, C., (2001) J. Phys. Condens. Matter, 13, pp. L337Petrovic, C., (2001) Europhys. Lett., 53, p. 354Pagliuso, P.G., (2001) Phys. Rev. B, 64, pp. 100503RNicklas, M., (2004) Phys. Rev. B, 70, p. 020505Mathur, N.D., (1998) Nature, 394, p. 39Moreno, N.O., (2002) Physica B, 312-313, p. 274Morris, G.D., (2004) Phys. Rev. B, 69, p. 214415Chen, G.F., (2002) J. Phys. Soc. Japan, 71, p. 2836Bianchi, A., (2001) Phys. Rev. B, 64, pp. 220504RNicklas, M., (2003) Acta Phys. Pol. B, 34, p. 90

Pressure-temperature Phase Diagrams Of In-plane Doped Cerhin5

In this work, we report a combined study about the effects of pressure and in-plane doping on the low temperature properties of AFM CeRhIn5. We have explored two different kinds of in-plane doping to perturb the AFM state of CeRhIn5. The La-doping in the Ce-site, which suppresses the AFM order simply by dilution and the Sn-doping in the In-sites, that suppresses the AFM order by increasing the Kondo-coupling. Electrical resistivity measurements under pressure were performed and the extracted pressure-temperature diagrams for these in-plane perturbed CeRhIn5 single crystals are compared to the properties of the pure compound. © 2007 Elsevier B.V. All rights reserved.460-462 ISPEC. ISS.672673Hegger, H., (2000) Phys. Rev. Lett., 84, p. 4986Pagliuso, P.G., (2001) Phys. Rev. B, 64, p. 100503. , (R)Petrovic, C., (2001) J. Phys.: Condens. Mat., 13, pp. L337Petrovic, C., (2001) Europhys. Lett., 53, p. 54Park, T., (2006) Nature, 440, p. 65Daniel, M., (2005) Phys. Rev. Lett., 95, p. 016406Fisher, R.A., (2002) Phys. Rev. B., 65, p. 22450