Numerical Simulation of Reciprocating Flow Forced Convection in Two-Dimensional Channels

Download

index.pdf

Date

2003-5-20

Author

Sert, Cüneyt

Metadata

Show full item record

Item Usage Stats

186
views

255
downloads

Numerical simulations of laminar, forced convection heat transfer for reciprocating, two-dimensional channel flows are performed as a function of the penetration length, Womersley (α) and Prandtl (Pr) numbers. The numerical algorithm is based on a spectral element formulation, which enables high-order spatial resolution with exponential decay of discretization errors, and second-order time-accuracy. Uniform heat flux and constant temperature boundary conditions are imposed on certain regions of the top surface, while the bottom surface is kept insulated. Periodicity of velocity and temperature fields is imposed on the side boundaries, while the flow is driven by an oscillating pressure gradient. These sets of boundary conditions enable time-periodic solution of the problem. Instantaneous and time-averaged surface and bulk temperature distributions, and Nusselt number variations are presented. For high α flows, the temperature field is significantly affected by the Richardson’s annular effect. Overall, forced convection increases by increasing the penetration length, α and Pr. Corresponding steady-flow simulations are performed by matching the volumetric flowrate. For the limited parameter space investigated in this paper, steady unidirectional forced convection is more effective than the reciprocating flow forced convection.

Subject Keywords

Channel Flow, Computational, Forced Convection, Heat Transfer, Pulsating

URI

https://hdl.handle.net/11511/28312

Journal

Journal of Heat Transfer

DOI

https://doi.org/10.1115/1.1565092

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Numerical simulation of thermal convection under the influence of a magnetic field by using solenoidal bases Yarımpabuç, Durmuş; Tarman, Işık Hakan; Department of Engineering Sciences (2011) The effect of an imposed magnetic field on the thermal convection between rigid plates heated from below under the influence of gravity is numerically simulated in a computational domain with periodic horizontal extent. The numerical technique is based on solenoidal basis functions satisfying the boundary conditions for both velocity and induced magnetic field. The expansion bases for the thermal field are also constructed to satisfy the boundary conditions. The governing partial differential equations are ...
Numerical and experimental analysis for comparison of square, cylindrical and plate fin arrays in external flow İnci, Aykut Barış; Bayer, Özgür; Department of Mechanical Engineering (2018) Geometrical optimization of square, cylindrical and plate fins for heat transfer augmentation is numerically performed in the external flow. Heat transfer performance of fins with different profiles are compared with same Reynolds number. The relation between the thermal characteristic of fins and boundary conditions like free-stream velocity and heat input are investigated. Experimental studies are performed using manufacturable fins to validate numerical model. Heat transfer correlations are derived in or...
Elliptical Pin Fins as an Alternative to Circular Pin Fins for Gas Turbine Blade Cooling Applications Part 2 Wake Flow Field Measurements and Visualization Using Particle Image Velocimetry Uzol, Oğuz (null; 2001-06-07) Extensive wake flow field measurements and visualizations are conducted using particle image velocimetry (PIV) inside the wakes of the elliptical and circular pin fin arrays in order to better understand the flow physics and the loss mechanisms of these devices. The true-mean velocity field inside the wake two diameters downstream of the pin fin arrays is obtained by collecting and ensemble averaging a large number of PIV samples in the midplane of the test section. Additional experiments are also conducted...
Experimental investigation and CFD analysis of rectangular profile FINS in a square channel for forced convection regimes Ayli, Ece; Bayer, Özgür; Aradağ Çelebioğlu, Selin (2016-11-01) Steady-state heat transfer from rectangular fin arrays is examined experimentally and numerically for turbulent fully developed flow. The effects of geometrical parameters on heat transfer coefficient and Nusselt number are investigated. For different inter fin ratios, Reynolds number and Nusselt number dependence of the results is investigated. A generalized empirical correlation for Nusselt number is developed for rectangular fins for a Reynolds number range of 17 x 10(7) < Re < 2.47 x 10(8), and an aspec...
Direct Numerical Simulation of Liquid Flow in a Horizontal Microchannel Tarı, İlker (2005-07-21) Numerical Simulations of liquid flow in a micro-channel between two horizontal plates are performed. The channel is infinite in streamwise and spanwise directions and its height is taken as 3.1 x 10(-4) m which falls within the dimension ranges of micro-channels. The Navier-Stokes equations with the addition of Brinkman number (Br) to the energy equation are used as the governing equations and a spectral methods based approach is applied to obtain the required accuracy to handle liquid flow in the micro-cha...

Citation Formats

C. Sert, “Numerical Simulation of Reciprocating Flow Forced Convection in Two-Dimensional Channels,” Journal of Heat Transfer, pp. 403–412, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28312.