Download Two-Phase Flow in Complex Systems by Salomon Levy PDF
By Salomon Levy
This can be a complete and well timed textual content on multiphase movement and warmth move for a nuclear engineer and those that have an interest in nuclear reactor security review, to have an image of what could be happending in nuclear energy vegetation less than coincidence stipulations, together with hypothetical center meltdown events. it truly is invaluable considering the fact that a majority of these who run reactor-safety laptop codes do not need sturdy grip on phenomenological figuring out and types which shaped the spine of those codes. With admire to critical injuries, the writer made an amazing try and transcend the mundane of empiricism, yet phenomena are too advanced and there are too huge uncertainties that one way or the other reduces the price of specified modeling of specific procedures. wisdom won thus far in simulant-materials and small-scale experiments no longer inevitably offers the sufficient photograph of what may ensue in reality.Especially considering normally, measurements have been oblique and versions are speculative. hence a feeling of warning is usually recommended to seem in the back of equations and conscious of the place and the way they have been derived or stipulations during which correlations have been bought.
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Additional info for Two-Phase Flow in Complex Systems
Sample text
Scaling for LOCAs in nuclear power plants basically has been a streamtube approach. In other words, the test facility is designed to duplicate a portion of the prototypical reactor flow confined within a streamtube. In the prototype, the streamtube does not have a solid boundary, whereas it would in a reduced-scale facility. The solid walls introduce pressure drop and heat losses in the scaled-down facility which do not exist in the prototype, and it is important that such losses be minimized and that the streamtube being tested be large enough not to affect thennal-hydraulic behavior away from the walls.
1 . Its similarity to the breakdown in Chapter I is strong but not surprising because both approaches employ a top-down process. 3. 1 . At the lowest level, the transfer process is characterized by the rate of transfer (temporal scale) and by the transfer area (spatial scale). Because of the presence of other constituents (phases and/or geometries), a third scale measure, the volume fraction, needs to be taken into account. 3 . 1 . It should be noted that under the level assigned to phases, the possibility of a gas (g), liquid (j), and solid (s) are recognized.
In the sections that follow, additional summary comments are provided about step 1 (system characteristics), step 2 (scenarios), step 4 (phenomena identification and ranking), and steps 5 and 6 (test matrix and plan). The topic in step 7 (scaling and testing of complex systems) is covered in detail in Chapter 2, and steps 3, 8, and 9, which cover system codes and their uncertainties, are discussed in Chapter 3 . 4 ELEMENTS OF AN INTEGRATED TESTING AND ANALYSIS PROGRAM 15 Elemen t ! 1 -- t a m i If warranted by - I I code.