The boiling curve, giving the wall temperature in function of the applied flux and flow conditions, is essential for the design of such cooling configurations. In this paper, a new entropy balance for subcooled boiling flow, which allows the wall temperature to be obtained, is presented and ...
aThe flash boiling in a flow can lead to change of flow regimes, from hydraulic to critical (flow crises) [5], which can be interpreted as a nonequilibrium phase transition. 一刹那煮沸在流程可能导致流程政权的变动,从水力对 (临界水流危机) (5),可以被解释作为不平衡相变。 [translate] ...
A three-dimensional two-fluid code Neptune_CFD has been validated against the Arizona State University (ASU) and DEBORA boiling flow experiments. Two-phase flow processes in the subcooled flow boiling regime have been studied on ASU experiments. Within this scope a new wall function has been impl...
THE ONSET OF FLOW INSTABILITY FOR A DOWNWARD FLOW OF A NON-BOILING HEATED LIQUID 来自 jsme.or.jp 喜欢 0 阅读量: 36 作者:I Babelli,M Ishii 摘要: The first three terms on the right hand side of equation (3) are functions of inlet velocity. Frictional and orifice pressure drop are ...
The boiling transition model Liquid Sublayer Dryout is based on the energy balance and was extended to the annular flow region. The flow parameters of these models were determined by a drift flux model. The numerical prediction of boiling transition heat flux confirms with the experimental results...
Starting from this value, the ammonia flow rate requested by the Rankine top cycle can be determined with an energy balance of the R717 condenser [7]. Regarding the points shown in Figure 6, the ammonia flow rate is equal to: ṁNH3=ṁLNG∙CLNGp∙(tLNGout−tLNGin)hE−hAm...
In order to establish the IVR, the cooling technology should be considered in forced flow boiling with the downward heat transfer surface. Moreover, we proposed a two-layer structured HPP for further CHF enhancement. Therefore, in the present paper the effect of the single and two layers HPPs...
The objective of the present study is to develop a correlation applicable to prediction of axially local heat transfer coefficient in flow boiling inside small diameter tubes. In the previous studies, it was found that, for accurate prediction of the heat transfer in small diameter tubes, it was...
Keywords: numerical simulation; microgravity field; flow boiling; entropy generation; performance evaluation1. Introduction The studies on lighter, smaller spacecraft with more functions have been promoted by deeper space exploration missions [1]. The limited volume of a highly integrated spacecraft with...
reactive flow; physicochemical hydrodynamics; s-CLSVOF; bubble growth and rising; transport of species; interfacial mass transfer Graphical Abstract1. Introduction Multiphase flows are encountered in many different scientific and industrial applications such as atomization in combustion [1], boiling in ...