Effect of gas mass flux on two-phase flow heat transfer coefficients in a flat microchannel under local heating using high-speed schlieren visualization

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Effect of gas mass flux on two-phase flow heat transfer coefficients in a flat microchannel under local heating using high-speed schlieren visualization. / Dementyev, Yuriy A.; Degtyarev, S. A.; Cheverda, Vyacheslav V. et al.

In: Journal of Flow Visualization and Image Processing, Vol. 32, No. 4, 4, 2025, p. 41-50.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{feb7b7cfff9f45ca8537a5c83b2696c0,

title = "Effect of gas mass flux on two-phase flow heat transfer coefficients in a flat microchannel under local heating using high-speed schlieren visualization",

abstract = "This article presents data of two-phase flow in a flat microchannel with schlieren high-speed visualization to investigate the effect of gas mass flux on heat transfer coefficients in the gas mass fluxes range from 0.074 to 14.89 kg/m2s. A dielectric liquid HFE-7100 was used as a working fluid, and high parity nitrogen was used as a working gas. The developed script in the MATLAB{\textregistered} is described and used to calculate quantitatively local characteristics of the flow, such as the areas occupied by liquid film-gas flow and the areas of dynamic dry spots. It has been shown that the growth of heat transfer coefficients with increasing gas mass flux associated with increasing of liquid film-gas flow areas, which indicates heat transfer enhancement during the evaporation of thin liquid film into dry gas. It has been also shown that decreasing of heat transfer coefficients with increasing gas mass flux associated with dynamic dry spots development.",

keywords = "two-phase flow, schlieren visualization, microchannel, liquid film, dry spots",

author = "Dementyev, {Yuriy A.} and Degtyarev, {S. A.} and Cheverda, {Vyacheslav V.} and Chinnov, {Evgeny A.}",

note = "Effect of gas mass flux on two-phase flow heat transfer coefficients in a flat microchannel under local heating using high-speed schlieren visualization / Yu. Dementyev, S. Degtyarev, V. Cheverda, E. Chinnov // Journal of Flow Visualization and Image Processing. – 2025. - V. 32. - N. 4. - Pp. 41-50. – DOI 10.1615/jflowvisimageproc.2025057359. – EDN AWEROA.",

year = "2025",

doi = "10.1615/jflowvisimageproc.2025057359",

language = "English",

volume = "32",

pages = "41--50",

journal = "Journal of Flow Visualization and Image Processing",

issn = "1065-3090",

publisher = "Begell House Inc.",

number = "4",

}

RIS

TY - JOUR

T1 - Effect of gas mass flux on two-phase flow heat transfer coefficients in a flat microchannel under local heating using high-speed schlieren visualization

AU - Dementyev, Yuriy A.

AU - Degtyarev, S. A.

AU - Cheverda, Vyacheslav V.

AU - Chinnov, Evgeny A.

N1 - Effect of gas mass flux on two-phase flow heat transfer coefficients in a flat microchannel under local heating using high-speed schlieren visualization / Yu. Dementyev, S. Degtyarev, V. Cheverda, E. Chinnov // Journal of Flow Visualization and Image Processing. – 2025. - V. 32. - N. 4. - Pp. 41-50. – DOI 10.1615/jflowvisimageproc.2025057359. – EDN AWEROA.

PY - 2025

Y1 - 2025

N2 - This article presents data of two-phase flow in a flat microchannel with schlieren high-speed visualization to investigate the effect of gas mass flux on heat transfer coefficients in the gas mass fluxes range from 0.074 to 14.89 kg/m2s. A dielectric liquid HFE-7100 was used as a working fluid, and high parity nitrogen was used as a working gas. The developed script in the MATLAB® is described and used to calculate quantitatively local characteristics of the flow, such as the areas occupied by liquid film-gas flow and the areas of dynamic dry spots. It has been shown that the growth of heat transfer coefficients with increasing gas mass flux associated with increasing of liquid film-gas flow areas, which indicates heat transfer enhancement during the evaporation of thin liquid film into dry gas. It has been also shown that decreasing of heat transfer coefficients with increasing gas mass flux associated with dynamic dry spots development.

AB - This article presents data of two-phase flow in a flat microchannel with schlieren high-speed visualization to investigate the effect of gas mass flux on heat transfer coefficients in the gas mass fluxes range from 0.074 to 14.89 kg/m2s. A dielectric liquid HFE-7100 was used as a working fluid, and high parity nitrogen was used as a working gas. The developed script in the MATLAB® is described and used to calculate quantitatively local characteristics of the flow, such as the areas occupied by liquid film-gas flow and the areas of dynamic dry spots. It has been shown that the growth of heat transfer coefficients with increasing gas mass flux associated with increasing of liquid film-gas flow areas, which indicates heat transfer enhancement during the evaporation of thin liquid film into dry gas. It has been also shown that decreasing of heat transfer coefficients with increasing gas mass flux associated with dynamic dry spots development.

KW - two-phase flow

KW - schlieren visualization

KW - microchannel

KW - liquid film

KW - dry spots

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001651190200001

UR - https://elibrary.ru/item.asp?id=84147568

UR - https://www.mendeley.com/catalogue/bf6c1b95-27e5-3c81-a943-0c19227bed42/

U2 - 10.1615/jflowvisimageproc.2025057359

DO - 10.1615/jflowvisimageproc.2025057359

M3 - Article

VL - 32

SP - 41

EP - 50

JO - Journal of Flow Visualization and Image Processing

JF - Journal of Flow Visualization and Image Processing

SN - 1065-3090

IS - 4

M1 - 4

ER -

ID: 80304003