Documents disponibles écrits par cet auteur

Oscillating and bouncing off of condensate droplets on a vertical superhydrophobic surface / Xuehu Ma in Journal of heat transfer, Vol. 134 N° 8 (special issue) (Août 2012) 

Public ISBD [article]  in Journal of heat transfer > Vol. 134 N° 8 (special issue) (Août 2012) . - 01 p. Titre : Oscillating and bouncing off of condensate droplets on a vertical superhydrophobic surface Type de document : texte imprimé Auteurs : Xuehu Ma, Auteur ; Sifang Wang, Auteur ; Zhong Lan, Auteur Année de publication : 2012 Article en page(s) : 01 p. Note générale : heat transfer Langues : Anglais (eng) Note de contenu : Photogallery DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000134000008 [...] [article] Oscillating and bouncing off of condensate droplets on a vertical superhydrophobic surface [texte imprimé] / Xuehu Ma, Auteur ; Sifang Wang, Auteur ; Zhong Lan, Auteur . - 2012 . - 01 p. heat transfer Langues : Anglais (eng) in Journal of heat transfer > Vol. 134 N° 8 (special issue) (Août 2012) . - 01 p. Note de contenu : Photogallery DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000134000008 [...]

Wetting mode evolution of steam dropwise condensation on superhydrophobic surface in the presence of noncondensable gas / Xuehu Ma in Journal of heat transfer, Vol. 134 N° 2 (Fevrier 2012) 

Public ISBD [article]  in Journal of heat transfer > Vol. 134 N° 2 (Fevrier 2012) . - 09 p. Titre : Wetting mode evolution of steam dropwise condensation on superhydrophobic surface in the presence of noncondensable gas Type de document : texte imprimé Auteurs : Xuehu Ma, Auteur ; Sifang Wang, Auteur ; Zhong Lan, Auteur Année de publication : 2012 Article en page(s) : 09 p. Note générale : Heat transfer Langues : Anglais (eng) Mots-clés : Air  Condensation  Contact  angle  Drops  Heat  transfer  Hydrophobicity  Steam  Surface  roughness  Wetting Index. décimale : 536 Chaleur. Thermodynamique Résumé : It is well known that heat transfer in dropwise condensation (DWC) is superior to that in filmwise condensation (FWC) by at least one order of magnitude. Surfaces with larger contact angle (CA) can promote DWC heat transfer due to the formation of “bare” condensation surface caused by the rapid removal of large condensate droplets and high surface replenishment frequency. Superhydrophobic surfaces with high contact angle (> 150°) of water and low contact angle hysteresis (< 5°) seem to be an ideal condensing surface to promote DWC and enhance heat transfer, in particular, for the steam-air mixture vapor. In the present paper, steam DWC heat transfer characteristics in the presence of noncondensable gas (NCG) were investigated experimentally on superhydrophobic and hydrophobic surfaces including the wetting mode evolution on the roughness-induced superhydrophobic surface. It was found that with increasing NCG concentration, the droplet conducts a transition from the Wenzel to Cassie-Baxter mode. And a new condensate wetting mode—a condensate sinkage mode—was observed, which can help to explain the effect of NCG on the condensation heat transfer performance of steam-air mixture on a roughness-induced superhydrophobic SAM-1 surface. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000134000002 [...] [article] Wetting mode evolution of steam dropwise condensation on superhydrophobic surface in the presence of noncondensable gas [texte imprimé] / Xuehu Ma, Auteur ; Sifang Wang, Auteur ; Zhong Lan, Auteur . - 2012 . - 09 p. Heat transfer Langues : Anglais (eng) in Journal of heat transfer > Vol. 134 N° 2 (Fevrier 2012) . - 09 p. Mots-clés : Air  Condensation  Contact  angle  Drops  Heat  transfer  Hydrophobicity  Steam  Surface  roughness  Wetting Index. décimale : 536 Chaleur. Thermodynamique Résumé : It is well known that heat transfer in dropwise condensation (DWC) is superior to that in filmwise condensation (FWC) by at least one order of magnitude. Surfaces with larger contact angle (CA) can promote DWC heat transfer due to the formation of “bare” condensation surface caused by the rapid removal of large condensate droplets and high surface replenishment frequency. Superhydrophobic surfaces with high contact angle (> 150°) of water and low contact angle hysteresis (< 5°) seem to be an ideal condensing surface to promote DWC and enhance heat transfer, in particular, for the steam-air mixture vapor. In the present paper, steam DWC heat transfer characteristics in the presence of noncondensable gas (NCG) were investigated experimentally on superhydrophobic and hydrophobic surfaces including the wetting mode evolution on the roughness-induced superhydrophobic surface. It was found that with increasing NCG concentration, the droplet conducts a transition from the Wenzel to Cassie-Baxter mode. And a new condensate wetting mode—a condensate sinkage mode—was observed, which can help to explain the effect of NCG on the condensation heat transfer performance of steam-air mixture on a roughness-induced superhydrophobic SAM-1 surface. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000134000002 [...]