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The role of the electric field in the departure of vapor bubbles in microgravity
ID
Bucci, Mattia
(
Avtor
),
ID
Zupančič, Matevž
(
Avtor
),
ID
Garivalis, Alekos Ioannis
(
Avtor
),
ID
Sielaff, Axel
(
Avtor
),
ID
Di Marco, Paolo
(
Avtor
),
ID
Golobič, Iztok
(
Avtor
)
PDF - Predstavitvena datoteka,
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MD5: 7AD76509B9AA486442E1FD1F4F163637
URL - Izvorni URL, za dostop obiščite
https://aip.scitation.org/doi/10.1063/5.0127123
Galerija slik
Izvleček
We present the results of a study aimed at investigating the effects of electric fields on quasi-static bubble departure dynamics during pool boiling of perfluorohexane (FC-72) in microgravity conditions. Analysis was performed through an alternative formulation of the bubble momentum balance in which the contribution of non-uniform electric stress distributions at the bubble interface can be quantified through high-speed video measurements without having to numerically solve the laws of electrostatics. Data used in this study were obtained in the scope of the Multiscale Boiling Project, which included advanced single bubble growth experiments performed aboard the International Space Station. Our results confirm that bubble departure counterintuitively begins before the force resulting from electric stresses starts to pull the bubble up from the wall. When this occurs, it is shown that the shrinking process of the contact line accelerates, in agreement with known theoretical results. It is concluded that the electric force is essentially determined by the electric stress distribution at the bubble cap above the contact area. Furthermore, we show that the electric stress at the bubble interface is also responsible for the increase in bubble internal overpressure, which explains the early departure of the bubble while increasing the intensity of the electric field. The results of this study provide an important step in achieving a more comprehensive understanding of the bubble behavior at the heated surface in the presence of an electric field, which is essential to optimally design electrodes and two-phase heat transfer devices for future space applications.
Jezik:
Angleški jezik
Ključne besede:
microgravity
,
liquid-vapor interface
,
electrophoresis
,
heat transfer
,
dielectric properties
,
electrostatics
,
bubble dynamics
,
electric field
,
force balance
,
International Space Station
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Recenzirani rokopis
Datum objave:
01.01.2023
Leto izida:
2023
Št. strani:
13 str.
Številčenje:
Vol. 35, iss. 1, art. 017109
PID:
20.500.12556/RUL-143668
UDK:
66.02:536.24
ISSN pri članku:
1070-6631
DOI:
10.1063/5.0127123
COBISS.SI-ID:
136576515
Datum objave v RUL:
06.01.2023
Število ogledov:
450
Število prenosov:
107
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Physics of fluids
Skrajšan naslov:
Phys. fluids
Založnik:
American Institute of Physics
ISSN:
1070-6631
COBISS.SI-ID:
37828865
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
mikrogravitacija
,
parno-kapljevita meja
,
elektroforeza
,
prenos toplote
,
dielektrične lastnosti
,
elektrostatika
,
dinamika parnih mehurčkov
,
električno polje
,
ravnotežje sil
,
Mednarodna vesoljska postaja
Projekti
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
European Space Agency
Številka projekta:
AO-2004–111
Akronim:
BOILING
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
European Space Agency
Številka projekta:
AO-1999–110
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0223
Naslov:
Prenos toplote in snovi
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
J2-2486
Naslov:
Izboljšan prenos toplote pri vrenju z uporabo hierarhičnih funkcionaliziranih površin (eHEATs)
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
German Aerospace Center (DLR)
Številka projekta:
50WM1959
Naslov:
Vapor II project
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