Open Access
ARTICLE
NUMERICAL INVESTIGATION FOR THE LAMINAR FLOW EFFECTS OVER ROUGH SURFACE USING DIRECTION SPLITTING
Mei Sua
, Ligai Kangb, Kangjie Sunb,*
a School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
b School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, China
* Corresponding author. Email: sunkangjie0606@sina.com
Frontiers in Heat and Mass Transfer 2022, 18, 1-5. https://doi.org/10.5098/hmt.18.22
Abstract
To study the heat transfer effect of rough surface in laminar flow, the direction splitting method is introduced by fully developed fields for solving the
Navier–Stokes equations of incompressible flow in assuming two-dimension. Firstly, the algorithm of the incompressible Navier–Stokes equations
with pressure correct is carried out. Secondly, the effects of pressure drop and heat transfer are investigated in different rough surface elements which
are configured with triangular and rectangular elements. The Reynolds number, roughness element spacing, and roughness height are also considered
as the factors which affect the heat transfer. The results indicate that the parallel present method reaches the stage of basically stable state rapidly and
accurately. Compared with the smooth surface, the global performance of heat transfer is improved by the roughness surface since the pressure drop is
lost. The effects of triangular element roughness surface on laminar flow and heat transfer are much stronger than rectangular element roughness
surface when the spacing of the rough is changed. The flow over the triangular element roughness surface becomes stronger, which contributes to
enhancement heat transfer meanwhile increase the pressure drop when the roughness height is higher.
Keywords
Cite This Article
Su, M., Sun, K. (2022). NUMERICAL INVESTIGATION FOR THE LAMINAR FLOW EFFECTS OVER ROUGH SURFACE USING DIRECTION SPLITTING.
Frontiers in Heat and Mass Transfer, 18(1), 1–5.