TY - JOUR

T1 - Experimental study of dispersed flows in microchannels for 3D printing of composite materials

AU - Kovalev, A. V.

AU - Yagodnitsyna, A. A.

AU - Bilsky, A. V.

N1 - Публикация для корректировки.

PY - 2022

Y1 - 2022

N2 - The paper studies the segmented flow patterns of immiscible liquids in microchannels with T- and X-junction for 3D printing technologies. The flow visualization results serve to build the flow pattern maps with a distinguished area of stable plug flow. A fair agreement of the maps plotted using the superficial flow velocities is revealed, and the influence of the junction geometry on the boundaries of flow patterns is shown to be insignificant. When using a less viscous carrier phase, the region of a stable plug flow is demonstrated to expand towards higher superficial flow velocities. The separation of microdroplets from the trailing edges of plugs is investigated. It is found that the transition to the separation of microdroplets is described in terms of the capillary number, constructed from the bulk velocity of the phases, and the ratio of phase flow rates. Thus, a range of dimensionless parameters of microchannel devices, suitable for 3D printing of composite materials with specified properties is determined.

AB - The paper studies the segmented flow patterns of immiscible liquids in microchannels with T- and X-junction for 3D printing technologies. The flow visualization results serve to build the flow pattern maps with a distinguished area of stable plug flow. A fair agreement of the maps plotted using the superficial flow velocities is revealed, and the influence of the junction geometry on the boundaries of flow patterns is shown to be insignificant. When using a less viscous carrier phase, the region of a stable plug flow is demonstrated to expand towards higher superficial flow velocities. The separation of microdroplets from the trailing edges of plugs is investigated. It is found that the transition to the separation of microdroplets is described in terms of the capillary number, constructed from the bulk velocity of the phases, and the ratio of phase flow rates. Thus, a range of dimensionless parameters of microchannel devices, suitable for 3D printing of composite materials with specified properties is determined.

KW - 3D printing

KW - microchannels

KW - microdroplets

KW - plug flow

KW - two-phase flows

UR - https://www.mendeley.com/catalogue/7daf872d-712b-3262-b5da-b520f95ab02b/

U2 - 10.1134/S0869864322060117

DO - 10.1134/S0869864322060117

M3 - Article

VL - 29

SP - 913

EP - 920

JO - Thermophysics and Aeromechanics

JF - Thermophysics and Aeromechanics

SN - 0869-8643

IS - 6

ER -