Thermal characterization of turbulent flow in a channel with isosceles triangular ribs

Thianpong, Chinaruk; Chompookham, Teerapat; Skullong, Sompol; Promvonge, Pongjet

doi:10.1016/j.icheatmasstransfer.2009.03.027

Cited by 85 publications

(33 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Manca et al [6] presented a numerical investigation on air forced convection in a rectangular channel with constant heat flux applied on the bottom and upper external walls. Thinapong et al [7] presented an experimental investigation on turbulent heat transfer and friction loss behaviors of airflow through a constant heat flux (CHF) channel fitted with different heights of triangular ribs.…”

Section: Introductionmentioning

confidence: 99%

Enhancement heat transfer characteristics in the channel with Trapezoidal rib–groove using nanofluids

Al-Shamani

Sopian

Mohammed

et al. 2015

Case Studies in Thermal Engineering

View full text Add to dashboard Cite

a b s t r a c tNumerical study of heat transfer due to turbulent flow of nanofluids through rib-groove channel have been investigated. The continuity, momentum and energy equations are solved by the finite volume method (FVM). Four different rib-groove shapes have been examined. Four different types of nanoparticles, Al 2 O 3 , CuO, SiO 2 , and ZnO with different volumes fractions in the range of 1-4% and different nanoparticle diameter in the range of 25-70 nm, have been also studied. The computations are performed under constant temperature over a range of Reynolds number (Re) 10,000-40,000. Results indicate that the Trapezoidal with increasing height in the flow direction rib-trapezoidal groove has the best heat transfer rate and high Nusselt number. It is also found that the SiO 2 -nanofluid has the highest value of Nusselt number in comparison with the other type of nanofluids. The Nusselt number increases as the volume fraction increases and it decreases as the nanoparticle diameter increases. The present study shows that these Trapezoidal rib-groove using nanofluids have the potential to dramatically increase heat transfer characteristics and thus can be good candidates for the development of efficient heat exchanger device.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancement heat transfer characteristics in the channel with Trapezoidal rib–groove using nanofluids

Al-Shamani

Sopian

Mohammed

et al. 2015

Case Studies in Thermal Engineering

View full text Add to dashboard Cite

show abstract

“…It is found that the transverse ribbed surface in cooling channels could enhance heat transfer rates by forced convection. Several investigators have verified this phenomenon through simulations and experiments [4][5][6][7]. The ribbed surfaces act as a turbulence generator to break down the thermal resistance layer near the surface, therefore enhancing the heat transfer.…”

Section: Introductionmentioning

confidence: 96%

A study of cutting factors affecting the generation of functional hierarchical rib array structure in ultra-precision raster milling

Wang

Lee

2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Hierarchical ribs can be used to keep balance between heat transfer enhancement and pressure drop reduction. The unique hierarchical structure which features a first-order asymmetric arc rib imposed by second-order microgrooves greatly reduces the pressure drop as well as enhances the heat transfer. However, it is hard for conventional machining techniques to generate such complicated configurations, especially freeform geometries in the micron range. Taking advantage of ultra-precision raster milling (UPRM), a novel one-step machining process, for advanced hierarchical ribs is proposed and demonstrated. In this paper, the principle of the cutting strategy for the second-order microstructures and cutting conditions that affect the basic features of the structures are discussed. In addition, three-level factorial design of cutting speeds, feed rates, and depth of cuts were set and used to machine hierarchical ribs on a copper workpiece. It was found that the cutting strategy was affecting the geometry of secondorder microstructures of hierarchical ribs in UPRM. Moreover, the result revealed that at low levels of feed rate and cutting depth, a middle level of cutting speed provides a better quality of second-order microstructures than a middle level of feed rate, high level of cutting depth, and low level and high level of cutting speed. Maintaining a balance between machining efficiency and hierarchical structure generation quality is thoroughly assessed by machining second-order microgrooves on asymmetric arc primary surfaces.

show abstract

“…It was reported that the triangular ribs give the best thermal performance compared to other shapes like rectangular, circular, square, semi-circular etc. Thianpong et al [18] carried through an experimental investigation on turbulent flow in a channel with isosceles triangular ribs. Kwon et al [19] performed experimental analysis on a wavy duct with various corrugation angles to study the heat transfer and friction characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of 3D turbulent forced convective heat transfer and friction characteristics of a square duct

Gogoi¹,

Triveni²,

Panua³

2017

IJHT

View full text Add to dashboard Cite

Numerical investigations are carried out in a three dimensional square duct with wedge shaped rib and groove turbulators on its top and bottom wall to examine the effect of geometric parameters on turbulent forced convective heat transfer and friction characteristics. The study is perofrmed for geometric parameters for orientation of turbulators, groove height, rib gap, turbulator length and pitchat Reynolds number ranging from 10000 to 30000. The constant heat flux boundary condition is specified at the entire surfaces of the duct. The smooth duct is validated with the correlations established by Dittus Boelter, Gnielinski, Blasius and Petukhov. For this numerical assessment, k-ϵ turbulence model with enhanced wall treatment is used. The thermal enhancement is reported in terms of Nusselt number (Nu), Darcy friction factor (f) and thermal enhancement factor (TEF). Both the heat transfer and friction loss are found sensitive to the changes in the geometric parameters.

show abstract

Thermal characterization of turbulent flow in a channel with isosceles triangular ribs

Cited by 85 publications

References 15 publications

Enhancement heat transfer characteristics in the channel with Trapezoidal rib–groove using nanofluids

Enhancement heat transfer characteristics in the channel with Trapezoidal rib–groove using nanofluids

A study of cutting factors affecting the generation of functional hierarchical rib array structure in ultra-precision raster milling

Numerical investigation of 3D turbulent forced convective heat transfer and friction characteristics of a square duct

Contact Info

Product

Resources

About