Convective heat transfer in the thermal entrance region of finned double-pipe

Syed, K.S.; Iqbal, Mazhar; Mir, Nazir Ahmed

doi:10.1007/s00231-006-0123-9

Cited by 32 publications

(15 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average Nusselt numbers Nu h and Nu e and the two average products of the Fanning friction factor and the Reynolds number fRe h and fRe e may be expressed in their dimensionless form as [3][4][5][6][7][8][9][20][21][22][23][24][25]]…”

Section: Optimization Problem and Its Solutionmentioning

confidence: 99%

“…He employed the finite difference method for finding the numerical solution of the governing system of equations. Then for the same geometry, the performance of FDP in the entrance region of the developing flow was evaluated for various configurations of the finned annulus [21][22][23][24]. Syed et al [25] studied the flow and heat transfer characteristics, taking into account the heat transfer coefficient and the pressure loss as the measuring parameters, by using the finite element method for the solution of the governing momentum and energy equations.…”

mentioning

confidence: 99%

“…They considered the FDP problem with triangular fins for laminar convection. In [20][21][22][23][24][25], the influence of the annulus configuration on the heat transfer coefficient and the pressure loss was studied for only finite sets of values of the configuration parameters. In the present work, we have investigated optimum configurations of the annulus by specifying the lower and upper bounds of the configuration parameters for the parabolic fin profile.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Optimum Convection Through Parabolic Fins in Annulus of Double Pipe

Iqbal¹,

Syed

Ishaq

2015

Journal of Thermophysics and Heat Transfer

Self Cite

View full text Add to dashboard Cite

Optimum configurations of the parabolic finned annulus have been investigated for maximum convection by employing a genetic algorithm. The objective of the work is to enhance the heat transfer rate and minimize the pressure loss in the flow direction for optimum use of thermal energy and savings of cost. Flow is considered to be steady, laminar, incompressible, and fully developed, subjected to the constant heat flux boundary condition imposed at the finned inner pipe, made up of highly conductive material. A comparison of the present optimum configurations has been carried out with those based on the Nusselt number as an objective function. The results indicate that the present objective function gives, in many cases, cost-and weight-efficient optimum configurations with considerable reduction in pressure loss and provides optimum use of thermal energy along with handsome savings of cost. A comparison of the present optimum configurations of parabolic fins has also been carried out with those of trapezoidal and triangular fins. The results indicate that no single shape is best in all the situations and for all the criteria. The performance evaluation and comparison led to some very interesting findings regarding the configurations of the finned annulus and the choice of the objective function. The local results show that the fin tip plays a vital role for promoting the higher heat transfer rate.

show abstract

Section: Optimization Problem and Its Solutionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Optimum Convection Through Parabolic Fins in Annulus of Double Pipe

Iqbal¹,

Syed

Ishaq

2015

Journal of Thermophysics and Heat Transfer

Self Cite

View full text Add to dashboard Cite

show abstract

“…In [11], the actual pipes are deployed in a helical coil pattern. Other enhanced double-pipe heat exchangers involved features such as [12,13] (fins), [14] (louvered strips), [15] (ring protuberances), [16] (twisted inner square tube in an outer circular tube), [17] (bulbous protrusions in the inner tube wall), and [18,19] (two helically-wrapped circular tubes). The literature involving corrugated double pipe heat exchangers is virtually exclusively concerned with experimentation.…”

Section: Introductionmentioning

confidence: 99%

Thermal and fluid flow first-principles numerical design of an enhanced double pipe heat exchanger

Gorman

Krautbauer

Sparrow

2016

Applied Thermal Engineering

View full text Add to dashboard Cite

“…Syed et al [19] made numerical simulation of finned double-pipe heat exchanger, where fins are distributed around the outer wall of the inner pipe. By using H1 (constant heat flux) and T1 (constant wall temperature) boundary conditions and one-dimensional fin equation, he concluded that the fin heat loss increases if we increase the conductivity of fin.…”

Section: Introductionmentioning

confidence: 99%

Finite Difference Solution of Conjugate Heat Transfer in Double Pipe with Trapezoidal Fins

Ashraf¹,

Syed²,

Ishaq³

2020

Numerical Modeling and Computer Simulation

View full text Add to dashboard Cite

A conjugate heat transfer problem on the shell side of a finned double pipe heat exchanger is numerically studied by suing finite difference technique. Laminar flow with isothermal boundary conditions is considered in the finned annulus with fully developed flow region to investigate the influence of variations in the fin height, the number of fins and the fluid and wall thermal conductivities on the hydraulic and thermal design of the exchanger. The governing momentum and energy equations have been solved by a finite difference-based numerical algorithm. The improvement in heat transfer rates, the exchanger performance and the optimum configurations are discussed.

show abstract

Convective heat transfer in the thermal entrance region of finned double-pipe

Cited by 32 publications

References 20 publications

Optimum Convection Through Parabolic Fins in Annulus of Double Pipe

Optimum Convection Through Parabolic Fins in Annulus of Double Pipe

Thermal and fluid flow first-principles numerical design of an enhanced double pipe heat exchanger

Finite Difference Solution of Conjugate Heat Transfer in Double Pipe with Trapezoidal Fins

Contact Info

Product

Resources

About