International Journal of Fluid Mechanics Research
Erscheint 6 Ausgaben pro Jahr
ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110
IF:
1.1
5-Year IF:
1.3
Eigenfactor:
0.0002
JCI:
0.33
SJR:
0.256
SNIP:
0.49
CiteScore™::
2.4
H-Index:
23
Indexed in
Natural Convective Air Cooling of the PCBs Array in a Closed Casing
Volumen 25,
Ausgabe 4-6, 1998,
pp. 856-864
DOI: 10.1615/InterJFluidMechRes.v25.i4-6.370
ABSTRAKT
An experimental investigation was carried out to study the natural convective air cooling of the printed-circuit-boards (PCBs) array which was set up vertically in a closed casing. The results show that there exists an unstable thermal boundary layer on the top wall, which brings about vortex flow and temperature oscillation in the casing. Because of the thermal instability the air circulation in the casing is unsteady. Time-varying recirculation presents in the PCBs array. Experimental results were correlated in the form of Nu = f(Ra, r) with Rayleigh-number ranging from 102 to 105 at Pr = 0.71.
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