TY - JOUR

T1 - Experimental Investigation of the Effect of Nano- and Microroughnesses on the Intensity of Swirled Flow

AU - Naumov, I. V.

AU - Okulova, N. V.

AU - Sharifullin, B. R.

AU - Lomakina, V. A.

AU - Okulov, V. L.

N1 - Funding Information: This study was supported by the state within the framework of scientific research conducted under the guidance of leading scientists in Russian institutions of higher education, scientific institutions, and state scientific centers of the Russian Federation (agreement no. 075-15-2019-1923). Publisher Copyright: © 2021, Pleiades Publishing, Ltd.

PY - 2021/4

Y1 - 2021/4

N2 - The effect of nanoroughnesses on the structure of a closed vortex flow generated in a motionless vertical cylindrical container by an upper rotating disk with various roughnesses deposited on its surface is investigated. An increase in the Reynolds number is found in the presence of roughnesses on a rotating disk, which leads to an increase in the length along the axis of the vortex cell with circulating motion leading to the intensification of mixing and mass transfer. It is shown for the first time that, for the case of the Wenzel interaction of fluid with a surface (without an “air” interlayer between them), a 5–11% increase in the size of the vortex cell is observed for nanoroughnesses simulating the superhydrophobic surface of a lotus leaf. The results obtained are of interest for the further development of the vortex apparatus and reactors providing the complex vortex motion of ingredients, the optimization of the operation of existing installations, and the designing of new devices.

AB - The effect of nanoroughnesses on the structure of a closed vortex flow generated in a motionless vertical cylindrical container by an upper rotating disk with various roughnesses deposited on its surface is investigated. An increase in the Reynolds number is found in the presence of roughnesses on a rotating disk, which leads to an increase in the length along the axis of the vortex cell with circulating motion leading to the intensification of mixing and mass transfer. It is shown for the first time that, for the case of the Wenzel interaction of fluid with a surface (without an “air” interlayer between them), a 5–11% increase in the size of the vortex cell is observed for nanoroughnesses simulating the superhydrophobic surface of a lotus leaf. The results obtained are of interest for the further development of the vortex apparatus and reactors providing the complex vortex motion of ingredients, the optimization of the operation of existing installations, and the designing of new devices.

KW - mass transfer

KW - nanoroughnesses

KW - vortex flow

KW - vortex reactor

UR - http://www.scopus.com/inward/record.url?scp=85117325271&partnerID=8YFLogxK

UR - https://elibrary.ru/item.asp?id=48127422

UR - https://www.mendeley.com/catalogue/8fd87b6b-77a5-3a13-9771-7a6fe3ceb3c5/

U2 - 10.1134/S1028335821040029

DO - 10.1134/S1028335821040029

M3 - Article

AN - SCOPUS:85117325271

VL - 66

SP - 118

EP - 121

JO - Doklady Physics

JF - Doklady Physics

SN - 1028-3358

IS - 4

M1 - 7

ER -