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...m3. The mean testtemperatures ranged between 170 and 370 K. The first intercomparison of results left participants not fully satisfied, yet a careful analysis of measured data carried out by Ziebland =-=[1]-=- proved that discrepancies of results could be credited not only to differences in specimen densities, but also to the edge heat-losses of some apparatus not equipped with a secondary or a gradient gu...

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...ratus accuracy coming from this collaborative program were then carefully considered during the drafting of the International Standardizing Organization (ISO) Standard on the guarded hot plate method =-=[2]-=-. Bertasi et al. [3] developed also a mathematical model of heat-transfer within RBGFBs. They assumed the fibers as parallel rods uniformly distributed within a gas phase. By utilizing a temperature d...

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...g from this collaborative program were then carefully considered during the drafting of the International Standardizing Organization (ISO) Standard on the guarded hot plate method [2]. Bertasi et al. =-=[3]-=- developed also a mathematical model of heat-transfer within RBGFBs. They assumed the fibers as parallel rods uniformly distributed within a gas phase. By utilizing a temperature dependent function fo...

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...ual attainment of thermal steadystate. Long testing times (some days), to eliminate misinterpretations, are therefore required. An account on these problems is given in an earlier paper by the author =-=[4]-=-. All the effects of moisture are typical of high-density RBGFBs and have been observed on the material used for a more recent international round-robin, sponsored by ISO Committee TC-163. The measure...

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...of the specimen surface temperatures which would meet all the criteria for measurements on a reference specimen. The ground for this program lay on a theoretical model proposed by Corsan and Williams =-=[6]-=-. On this basis, different interface materials and thermocouple layouts were checked, according to the general scheme shown in Figure 1. The interface materials used in the NPL research program were: ...

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...y fibrous materials has encouraged theoretical and experimental investigations on the heat transfer mechanisms within light-density materials. Examples of this work include Cammerer [7] Linford et al =-=[8]-=-, Larkin and Churchill [9], Rennex [10], Pelanne and Albers [11,12,13]. These research efforts demonstrate the importance of radiation in the global heat-transfer process, and proved that thermal cond...

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... investigations on the heat transfer mechanisms within light-density materials. Examples of this work include Cammerer [7] Linford et al [8], Larkin and Churchill [9], Rennex [10], Pelanne and Albers =-=[11,12,13]-=-. These research efforts demonstrate the importance of radiation in the global heat-transfer process, and proved that thermal conductivity is not the right parameter to characterize the performance of...

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... investigations on the heat transfer mechanisms within light-density materials. Examples of this work include Cammerer [7] Linford et al [8], Larkin and Churchill [9], Rennex [10], Pelanne and Albers =-=[11,12,13]-=-. These research efforts demonstrate the importance of radiation in the global heat-transfer process, and proved that thermal conductivity is not the right parameter to characterize the performance of...