The effect of temperature on the permeability of a porous material

Porosity effect on microstructure, mechanical, and fluid dynamic properties of Ti2AlC by direct foaming and gel‐casting

“…In other cases, oxidation or chemical attack of the pore walls by the fluid can modify the surface roughness, the tortuosity or even the volume of channels, and irreversible changes in k 1 and k 2 may occur. The permeation of gases at progressively higher temperatures and the effect on k 1 and k 2 have already been well reported in the literature for a varied of porous ceramic materials . In this work, the thermal dependence of k 1 and k 2 for the Ti 2 AlC foams with different porosity levels was experimentally investigated with air flow at 3 different temperatures: 25, 350, and 700°C.…”

“…The permeation of gases at progressively higher temperatures and the effect on k 1 and k 2 have already been well reported in the literature for a varied of porous ceramic materials. [27][28][29][35][36][37][38] In this work, the thermal dependence of k 1 and k 2 for the Ti 2 AlC foams with different porosity levels was experimentally investigated with air flow at 3 different temperatures: 25, 350, and 700°C. Data reported in Figure 9 revealed practically no change in k 1 and a very minor decrease in k 2 up to 700°C, which is a confirmation that oxidation of the porous Ti 2 AlC matrix starts only above this temperature, as reported by Wang and Zhou 39 and Haftani et al 40 Tallman 36 studied the hot gas flow properties of Ti 2 AlC, Ti 3 AlC 2 , and Ti 3 SiC 2 disk samples prepared by hot pressing.…”

Hot zones formation during regeneration of diesel particulate filters

“…The other gas properties were calculated using the empirical relations reported in Bissett's article assuming that they are independent of temperature. The soot permeability was determined by the Pulkrabek and Ibele predictions 40. Bissett and Shadman41 showed that the length scale over which the gas temperature reached the same temperature as the solid temperature was several orders of magnitude smaller than the typical PM layer thickness.…”

Experimental Study on Hydraulic and Macro-Mechanical Property of a Mortar under Heating and Cooling Treatment

“…As reported in many publications (Caré 2008;Castellote et al 2004;Farage et al 2003;Lim and Mondal 2014;Rostásy et al 1980;Zhang et al 2013), the change of micro-structure and pore structures of mortar subjected to high temperatures was studied, revealing that the port-landite in mortar was decomposed abruptly and transformed into lime when it was heated up to 620°C before cooling (Castellote et al 2004). The transport properties of mortar subjected to temperature loading have been investigated (Caré 2008;Chen et al 2010;Chen et al 2010;Pulkrabek and Ibele 1987;Vydra et al 2001). The correlation between heating-induced crack porosity (and crack aspect ratio) and permeability has been investigated (Chen et al 2010).…”