Thermal Dispersion Effects on Convection Heat Transfer in Porous Media with Viscous Dissipation

Nasser, Ibraheem; Duwairi, H. M.

doi:10.18280/ijht.340208

Cited by 17 publications

(14 citation statements)

References 1 publication

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“…Access to an appreciable group of available experimental data is taken as a starting point for the present study. The correlation of the available experimental quantities allows having a unique function for the evaluation of condensation heat transfer coefficient, which responds to the following expression [25][26][27][28][29] (19) The experimental data used in the generalization and development of the expression (16) and (17) are provided in table 4. Figure 2 shows the correlation of experimental data.…”

Section: Experimental Validation Of a Single Model For Condensation Imentioning

confidence: 99%

Evaluation of condensation heat transfer in air-cooled condenser by dominant flow criteria

Camaraza-Medina¹,

Khandy²,

Carlson³

et al. 2018

MMEP

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In this paper, a modification to the dominant flow criteria is presented for the study of heat transfer by confined condensation in Air Cooled Condenser (ACC) systems. The new methodology combines in one single procedure the analysis, which with the current methods requires tedious grouping processes. A new proposal reduces the average error by computing 22% in 88.7% of the available samples and includes the shear stress produced by the steam drag when it flows at speeds greater than 40 m/s. New method is also valid for a vapor quality located between 0.9 and steam flows between 3 and 590 kg/(m2/s-1), values for the Reynolds number for the liquid portion between 660 and 58 540 and the Reynolds number for the vapor portion located between 1 320 and 333 120, internal equivalent diameters of the tubes comprised between 7.4 to 49 mm.

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Section: Experimental Validation Of a Single Model For Condensation Imentioning

confidence: 99%

Evaluation of condensation heat transfer in air-cooled condenser by dominant flow criteria

Camaraza-Medina¹,

Khandy²,

Carlson³

et al. 2018

MMEP

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“…Any flow problem must satisfy the law of conservation of mass. The mass conservation equation is also called the continuity equation, which can be expressed as: the mass increase in the fluid microcomponent per unit time, which is equal to the net mass flowing into the microcells at the same time interval [2]. The equation is as follows:…”

Section: Mass Conservation Equationmentioning

confidence: 99%

Study on numerical simulation of spirality inserted piece for heat exchanger

Guo¹,

Chen²,

Wu³

et al. 2017

MMC_B

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Heat exchanger is widely used in energy, power, chemical, metallurgy, machinery, transportation, aerospace and other fields. Heat exchanger with spirality inserted piece is a new type of energy-efficient developed on the basis of traditional shell and tube exchanger. In this paper, the numerical simulation method is used to prove that the spirality inserted piece heat exchanger tube has the characteristics of enhanced heat transfer. At the same time, the finite element model of the spirality inserted piece heat exchanger is used to simulation and analyze. And compared with the heat exchanger without this structure, the influence of size parameters of spirality inserted piece pitch on fluid motion and heat transfer in tube is obtained. Indicating the advantages and characteristics of heat transfer compared with traditional shell and tube exchanger. By comparing the different pitch of the heat exchanger pipe, get the relationship between spirality inserted piece pitch and heat transfer performance of pipe.

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“…They have also used nonequilibrium heat transfer models of porous media which have been verified by experiments 6 . Ibraheem Nasser and H.M. Duwairi have conducted research on convection heat transfer in porous media 7 . Mohamed Bachiri and Ahcene Bouabdallah have studied the natural convection theoretically by the direct integration of momentum and energy equations 8 .…”

Section: Introductionmentioning

confidence: 99%

Simulation of Solid-Liquid Phase Transition Process in Aluminum Foams Using the Lattice Boltzmann Method

Huang¹,

Chen²,

Shi³

2016

IJHT

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This paper aims to demonstrate the thermodynamics of a thermal storage system based on the latent heat of a composite Phase Change Material (PCM). The paper investigates the flow and heat transfer of solid-liquid phase transitions at the pore level using the Lattice Boltzmann method. The phase transitions process is described using the enthalpy method. A porous medium at the pore scale is constructed here by binarization processing of photograph. The single phase change process is compared with phase transitions in porous media. The simulation results indicate that during the whole heat transfer process, the conduction effect dominates in porous medium composite phase materials while the convection effect has a remarkable influence on a single phase change process. A temperature difference is found between the aluminum foams and phase change materials. Phase transitions in pored aluminum with different porosity are also simulated to validate the feasibility of the enthalpy model at the pore scale.

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Thermal Dispersion Effects on Convection Heat Transfer in Porous Media with Viscous Dissipation

Cited by 17 publications

References 1 publication

Evaluation of condensation heat transfer in air-cooled condenser by dominant flow criteria

Evaluation of condensation heat transfer in air-cooled condenser by dominant flow criteria

Study on numerical simulation of spirality inserted piece for heat exchanger

Simulation of Solid-Liquid Phase Transition Process in Aluminum Foams Using the Lattice Boltzmann Method

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