Numerical simulation of conjugate, turbulent mixed convection heat transfer in a vertical channel with discrete heat sources

Mathews, Roy N.; Balaji, C.

doi:10.1016/j.icheatmasstransfer.2006.02.013

Cited by 21 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Coussirat [22] imposed that the k-ε two-equation turbulence model could simulate the flow behaviors in the IJS. Mathews [23] also have used the k-ε model coupled the energy equation in analyzing heat transfer rate of a vertical passage with several thermal sources. Since the precious references have affirmed the capability of the k-ε model, the present study adopted this model to enclose the Navier-Stokes dynamic equations.…”

Section: Mathematic Modelmentioning

confidence: 99%

Energy conservation and heat transfer enhancement for mixed convection on the vertical galvanizing furnace

Mercola

Zhu

et al. 2020

THERM SCI

View full text Add to dashboard Cite

The alloying temperature is an important parameter that affects the properties of galvanized products. The objective of this study is to explore the mechanism of conjugate mixed convection in the vertical galvanizing furnace and propose a novel energy conservation method to improve the soaking zone temperature based on the flow pattern and heat transfer characteristics. Herein, the present study applied the k-ε two-equation turbulence model to enclose the Navier-Stokes fluid dynamic and energy conservation equations, and the temperature distributions of the steel plate and air-flow field in the furnace were obtained for six Richardson numbers between 1.91 ⋅ 10 5 and 6.30 ⋅ 10 5. In the industrial practice, the side baffles were installed at the lateral opening of the cooling tower to alter the height of vertical flow passage, which affected the Richardson number. The results indicate that the Richardson number of 2.4 ⋅ 10 5 generated the highest heat absorption and maximal temperature in the steel plate due to the balance between natural and forced convection. Furthermore, the results of the on-line experiments validated the simulation research. The method enhanced the steel plate temperature in the soaking zone without increasing the heat power, thereby characterizing it as energy conservation technology.

show abstract

Section: Mathematic Modelmentioning

confidence: 99%

Energy conservation and heat transfer enhancement for mixed convection on the vertical galvanizing furnace

Mercola

Zhu

et al. 2020

THERM SCI

View full text Add to dashboard Cite

show abstract

“…The experimental results are validated with numerical results obtained by COMSOL multi-physics 4.3 version package. Apart from this there are many studies available which speaks about the behavior of vertical parallel plates subjected to flow of fluid under forced and mixed convection flow regime [19][20][21][22][23]. Recently Samee et al have investigated numerically about effect of Prandtl number on coolant exit temperature flowing through the heat generating parallel plate channel and Li-ion battery cells [24,25].…”

Section: Introductionmentioning

confidence: 99%

Temperature and Location of Hot Spots Variation with Spacing in a Vertical Parallel Plate Channel: Conjugate View

Mohammad¹,

Afzal²,

Razak³

et al. 2019

IJHT

View full text Add to dashboard Cite

The objective of present investigation is twofold, one to determine the effect of operational parameter on maximum temperature (Hot spots temperature) in heat generating (uniform and non-uniform) vertical parallel plates and two is to find out the position of maximum temperature (hot spots location) when plates are placed apart at optimum spacing (Bopt). A conjugate two dimensional laminar forced convection analysis is carried out in which the equations regulating the heat and fluid flow are solved by using finite difference numerical technique and the obtained algebraic equations are solved by using Thomas algorithm. The parameters viz Reynolds Number (ReH), Conduction-Convection parameter (Ncc), Heat generation parameter (Qt), and Prandtl Number (Pr), Spacing between the plates (B) were considered for present study, while the aspect ratio (Ar) of the plate is kept constant. The major outcome of present study says that the location of hot spot is mainly affected by ReH and mode of heat generation (uniform and non-uniform). It is also found that the spacing between the plates (B), ReH, Pr and Ncc play a major role in reducing the hotspots temperature.

show abstract

“…Beyond these, there have been many studies available in the open literature related to experimental and numerical conjugate heat transfer analysis in channels with or without heat generation, or flow between arrays of fins under mixed or forced convection regimes. [23][24][25][26][27][28] The studies reported by Ramis and colleagues [29][30][31] were related to nuclear fuel elements subjected to conjugate external forced flow conditions in which the effect of various parameters on heat dissipation rate from the fuel element were depicted.…”

Section: Introductionmentioning

confidence: 99%

Effect of Prandtl number on the average exit temperature of coolant in a heat‐generating vertical parallel plate channel: A conjugate analysis

Afzal

Kaladgi

et al. 2018

Heat Trans. Asian Res.

View full text Add to dashboard Cite

A coupled conduction–convection heat transfer analysis is carried out for a two‐dimensional rectangular, vertical parallel plate channel producing volumetric energy (uniform and nonuniform), subjected to laminar forced‐convection incompressible fluid flow under steady‐state conditions. The equations governing the thermal and flow field are solved by using finite difference method, and the resulting algebraic equations are solved by using the tridiagonal matrix algorithm method. Four coolants with their Prandtl numbers (Pr), namely, liquid sodium (Pr = 0.005), sodium‐potassium (Pr = 0.00753), lead (Pr = 0.02252), and helium (Pr = 0.666) are used for the present conjugate analysis. Effects of different thermal and fluid flow parameters such as Reynolds number (ReH) ranging from 500 to 1500, conduction–convection parameter (Ncc), and total heat generation (Qt) on average exit temperature (θae) of coolants are studied. From the obtained results, it is found that the θae of coolant strongly depends on Pr, ReH, Ncc, and Qt when the aspect ratio (Ar) is kept constant. It is also found that with a nonuniform rate of heat generation, the coolant θae is high compared to uniform heat generation rate, whereas with increasing Ncc, the θae decreases, and with increasing Qt, the θae increases irrespective of coolants.

show abstract

Numerical simulation of conjugate, turbulent mixed convection heat transfer in a vertical channel with discrete heat sources

Cited by 21 publications

References 13 publications

Energy conservation and heat transfer enhancement for mixed convection on the vertical galvanizing furnace

Energy conservation and heat transfer enhancement for mixed convection on the vertical galvanizing furnace

Temperature and Location of Hot Spots Variation with Spacing in a Vertical Parallel Plate Channel: Conjugate View

Effect of Prandtl number on the average exit temperature of coolant in a heat‐generating vertical parallel plate channel: A conjugate analysis

Contact Info

Product

Resources

About