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Acoustic emission events from sodium vapour bubble collapsing: a stochastic model

Abstract

The forward Kolomogorov equation method has been applied to a zero-dimensional model which describes the time distribution of acoustic emissions from sodium vapour bubble collapsing. Processes taken into account as components for outlining the upstated phenomenon are: energy generation, energy dissipation, bubble creation, acoustic emission and energy release from bubble collapsing. Processes involve affect or are induced by a population of particles (bubbles, acoustic pulses) and pseudoparticles (energetic units). A formulation is obtained for the expected values of some stochastic indicators, i.e., factorial moments and cumulants, autocorrelation functions, waiting time distribution between contiguous events, of the time series consisting of acoustic emission pulses as detected by a suitable sensor. Preliminary, but promising, validation of the model and a sound prelude to effective boiling regime diagnosing is obtained by processing data from the out-of-pile CFNa loop in Grenoble, France. Data are collected from a piezoelectric accelerometer located nearby the circuit.
Authors:
Colombino, A; Dentico, G; Pacilio, N; Papalia, B; Taglienti, S; Tosi, V; Vigo, A; [1]  Galli, C [2] 
  1. Comitato Nazionale per l'Energia Nucleare, Casaccia (Italy). Centro di Studi Nucleari
  2. Rome Univ. (Italy). Ist. di Matematica
Publication Date:
Jan 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-12-605331; EDB-81-082206
Resource Relation:
Journal Name: Prog. Nucl. Energy; (United Kingdom); Journal Volume: 7:1
Subject:
42 ENGINEERING; SODIUM; BUBBLES; NUCLEATE BOILING; ACOUSTIC EMISSION TESTING; DISSIPATION FACTOR; GRENOBLE CYCLOTRON; KOLMOGOROV EQUATION; LIQUID METALS; MATHEMATICAL MODELS; STOCHASTIC PROCESSES; VAPORS; ACCELERATORS; ACOUSTIC TESTING; ALKALI METALS; BOILING; CYCLIC ACCELERATORS; CYCLOTRONS; DIFFERENTIAL EQUATIONS; ELEMENTS; EQUATIONS; FLUIDS; GASES; ISOCHRONOUS CYCLOTRONS; LIQUIDS; MATERIALS TESTING; METALS; NONDESTRUCTIVE TESTING; PHASE TRANSFORMATIONS; TESTING; 420400* - Engineering- Heat Transfer & Fluid Flow
OSTI ID:
6518448
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: PNEND
Submitting Site:
INIS
Size:
Pages: 59-72
Announcement Date:

Citation Formats

Colombino, A, Dentico, G, Pacilio, N, Papalia, B, Taglienti, S, Tosi, V, Vigo, A, and Galli, C. Acoustic emission events from sodium vapour bubble collapsing: a stochastic model. United Kingdom: N. p., 1981. Web. doi:10.1016/0149-1970(81)90060-3.
Colombino, A, Dentico, G, Pacilio, N, Papalia, B, Taglienti, S, Tosi, V, Vigo, A, & Galli, C. Acoustic emission events from sodium vapour bubble collapsing: a stochastic model. United Kingdom. doi:10.1016/0149-1970(81)90060-3.
Colombino, A, Dentico, G, Pacilio, N, Papalia, B, Taglienti, S, Tosi, V, Vigo, A, and Galli, C. 1981. "Acoustic emission events from sodium vapour bubble collapsing: a stochastic model." United Kingdom. doi:10.1016/0149-1970(81)90060-3. https://www.osti.gov/servlets/purl/10.1016/0149-1970(81)90060-3.
@misc{etde_6518448,
title = {Acoustic emission events from sodium vapour bubble collapsing: a stochastic model}
author = {Colombino, A, Dentico, G, Pacilio, N, Papalia, B, Taglienti, S, Tosi, V, Vigo, A, and Galli, C}
abstractNote = {The forward Kolomogorov equation method has been applied to a zero-dimensional model which describes the time distribution of acoustic emissions from sodium vapour bubble collapsing. Processes taken into account as components for outlining the upstated phenomenon are: energy generation, energy dissipation, bubble creation, acoustic emission and energy release from bubble collapsing. Processes involve affect or are induced by a population of particles (bubbles, acoustic pulses) and pseudoparticles (energetic units). A formulation is obtained for the expected values of some stochastic indicators, i.e., factorial moments and cumulants, autocorrelation functions, waiting time distribution between contiguous events, of the time series consisting of acoustic emission pulses as detected by a suitable sensor. Preliminary, but promising, validation of the model and a sound prelude to effective boiling regime diagnosing is obtained by processing data from the out-of-pile CFNa loop in Grenoble, France. Data are collected from a piezoelectric accelerometer located nearby the circuit.}
doi = {10.1016/0149-1970(81)90060-3}
journal = {Prog. Nucl. Energy; (United Kingdom)}
volume = {7:1}
journal type = {AC}
place = {United Kingdom}
year = {1981}
month = {Jan}
}