Heat transfer increase by convection in liquid-infused surfaces for laminar and turbulent flows

نویسندگان

چکیده

Liquid-infused surfaces (LIS) can reduce friction drag in both laminar and turbulent flows. However, the heat transfer properties of such multi-phase have still not been investigated to a large extent. We use numerical simulations study conjugate liquid-filled grooves. It is shown that increase for liquid flows due recirculation surface texture. For be substantial, thermal conductivity solid must similar fluids, grooves sufficiently strong (P\'eclet number larger than 1). The ratio cavity system height an upper limit direct contribution from recirculation. While this significant microchannels, it limited flows, where scale (e.g. channel height) usually much texture height. enhancement on order $10\%$ observed (with net reduction) flow at Reynolds $Re_\tau \approx 180$. convection bulk enhanced indirectly

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Numerical simulation of Laminar Free Convection Heat Transfer around Isothermal Concave and Convex Body Shapes

In the present research, free convection heat transfer from isothermal concave and convex body shapes is studied numerically. The body shapes investigated here, are bi-sphere, cylinder, prolate and cylinder with hemispherical ends; besides, they have the same height over width (H/D = 2). A Numerical simulation is implemented to obtain heat transfer and fluid flow from all of the geometries in a...

متن کامل

Inverse Boundary Design Problem of Combined Radiation-convection Heat Transfer in Laminar Recess Flow

In the present work, an inverse analysis of combined radiation and laminar forced convection heat transfer in a two-dimensional channel with variable cross sections is performed. The conjugate gradient method is used to find the temperature distribution over the heater surface to satisfy the prescribed temperature and heat flux distributions over the design surface. The fluid is considered to b...

متن کامل

Heat transfer & large-scale dynamics in turbulent Rayleigh-Bénard convection

The progress in our understanding of several aspects of turbulent Rayleigh-Bénard convection is reviewed. The focus is on the question of how the Nusselt number and the Reynolds number depend on the Rayleigh number Ra and the Prandtl number Pr, and on how the thicknesses of the thermal and the kinetic boundary layers scale with Ra and Pr. Non-Oberbeck-Boussinesq effects and the dynamics of the ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of Fluid Mechanics

سال: 2022

ISSN: ['0022-1120', '1469-7645']

DOI: https://doi.org/10.1017/jfm.2022.279