※一部利用できない機能があります
| 1.
論文 |
論文
|
Amagai, Kenji ; Hashimoto, Hiroyuki
概要:
application/pdf<br />Journal Article<br />Constitutive equations regarding the drift flux model for a multiphase flow consisting of molten material and its solidified particles were thermodynamically derived under a condition of local
…
quasiequilibrium. The basic equations, including the conservation equations and the constitutive equations for the multiphase flow, were expressed in dimensionless forms. The theory developed here confirmed that the temperature fields closely depended on the Lagrangian derivative of the solid fraction accompanying the latent heat effect, and was characterized by the Stefan number. It was also suggested that the simplified basic equations corresponding to the phase equilibrium diagram were useful in the analysis of multiphase flow with solid-liquid phase change.
続きを見る
|
||
| 2.
論文 |
論文
|
Hashimoto, Hiroyuki ; Amagai, Kenji
概要:
application/pdf<br />Journal Article<br />The conservation equations of mass, momentum and energy for a molten liquid flow of two chemical constituents with their solidified particles were derived by means of the averaging method. The
…
drift flux model equations for the fine particles were also derived under a locally homogeneous approximation. The present model suggests that the energy equation should have energy transport terms corresponding to the heat conduction, the migration of particles and the diffusion of chemical constituents. As representative examples, these energy transports were evaluated quantitatively for binary molten salt and liquid alloy under the assumption of a locally thermal equilibrium. The results show that the energy conservation equation for solidified particles and melt flow should include an energy transport term due to particle migration.
続きを見る
|
||
| 3.
論文 |
論文
|
INADA, Shigeaki ; MIYASAKA, Yoshiki ; SAKUMOTO, Masakazu
概要:
application/pdf<br />Journal Article<br />This report describes liquid-solid contact behavior in the subcooled pool transition-type boiling regime and the minute bubble emission boiling regime, detected by a void probe that uses a
…
series-resonance circuit. This probe can approach the heated surface within two to three micrometers. The liquid-solid contact state discussed in this report means the nucleate boiling state caused by liquid invasion or Leidenfrost state caused by liquid rush onto the dry part on the heated surface. The dried area on the heated surface was estimated on the basis of the void signal, and the relation between the dried area on the heated surface and the measured heat flux was clarified by introducing a nucleate boiling model.
続きを見る
|
||
| 4.
論文 |
論文
|
INADA, Shigeaki ; MIYASAKA, Yoshiki ; SAKAMOTO, Kenji
概要:
application/pdf<br />Journal Article<br />The heat flux was measured at the second burnout point of pool boiling over the range of high subcooling of 30 K to 88 K, under atmospheric pressure. The relation between the heat flux and
…
subcooling was obtained by a mathematical model based on the mass-transfer mechanism of evaporation and condensation through a coalescent vapor bubble, and by a kinetic theory of molecules. The relationship equation gave fairly good agreement with the experimental results and showed that the second burnout heat flux did not increase unlimitedly with subcooling, but that it had a maximum value at a certain subcooling.
続きを見る
|
