Conjugate heat transfer in a duct using nanofluid by two-phase Eulerian–Lagrangian method: Effect of non-uniform heating

Borah, Abhijit; Boruah, Manash Protim; Pati, Sukumar

doi:10.1016/j.powtec.2019.01.059

Cited by 29 publications

(13 citation statements)

References 38 publications

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“…From the results it is clear that the use of nanofluid augments the heat transfer coefficient as compared to base fluid. 25 , 32 One can notice that the heat transfer coefficient increases with the increment of Reynolds number 24 (Figure 9(a)). With the increase in Re from 700 to 1650, heat transfer coefficient is increased by 34% for ϕ = 4%, and H out = 2.75 mm while it increases by 30% for ϕ = 0%, and H out = 3.5 mm.…”

Section: Resultsmentioning

confidence: 95%

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Implication of geometrical configuration on heat transfer enhancement in converging minichannel using nanofluid by two phase mixture model: A numerical analysis

Faizan

Pati

Randive

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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In the present study laminar forced convective flow of nanofluid through a converging minichannel is investigated numerically by employing two phase mixture model. The heat transfer enhancement and the corresponding pressure drop are analyzed for the following range of parameters: Reynolds number (700 ≤ Re ≤ 1650), particle volume concentration (0% ≤ ϕ ≤ 4%) and converging angle (θ = 0.029°, 0.043° and 0.05°). The results indicate that there is a considerable increase in pressure drop coupled with enhancement in heat transfer rate with particle loading due to the improvement in the thermal properties of the resulting mixture. The pressure drop in the converging channel increases with the converging angle. The pressure drop augments as high as 2 times by advancing the particle loading from 0% to 4%. The wall temperature decreases appreciably by 34 K and heat transfer coefficient is enhanced by as high as 98% from Re = 700, ϕ = 0% and straight channel to Re =1650, Hout = 2.75mm and ϕ = 4%. The enhancement in heat transfer and corresponding increase in pressure drop as compared to equivalent straight channel is presented by the performance factor, which increases with decrease in converging angle. There is a significant concern of the pumping power with increase in converging angle, volume fraction and Reynolds number.

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Section: Resultsmentioning

confidence: 95%

“…Borah et al. 25 studied the conjugate heat transfer for flow in a duct with non-uniform heating using nanofluid modelled by two phase Eulerian-Lagrangian method and found that non uniform heating decreases the heat transfer which can be compensated by the use of nanofluid. Boruah et al.…”

Section: Introductionmentioning

confidence: 99%

Implication of geometrical configuration on heat transfer enhancement in converging minichannel using nanofluid by two phase mixture model: A numerical analysis

Faizan

Pati

Randive

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Gireesha et al 24 investigated the effects of the magnetic field, boundary condition, and suction/injection on the entropy generation for flow of Casson fluid through a porous inclined microchannel. Conjugate heat transfer analysis on nanofluid subjected to nonuniform asymmetric heating is also available 25,26 . Irreversibility analysis for laminar flow of a nanofluid in a channel with an obstacle pointed out the effect of wall conduction on the entropy generation 27 .…”

Section: Introductionmentioning

confidence: 99%

Influence of conjugate heat transfer on the minimization of entropy generation for forced convective flow through parallel plate channel filled with porous material

Borah

Pati

2021

Heat Trans

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A fluid–solid conjugate heat transfer model is developed to analyze the characteristics of entropy generation for forced convective steady hydrodynamically fully developed laminar flow of a Newtonian fluid through a parallel plate channel filled with porous material by modulating the following parameters: substrate thickness, the ratio of thermal conductivity of wall to fluid, Biot number, the axial temperature gradient in the fluid, and Peclet number. The exteriors of both the walls are subjected to the thermal boundary conditions of the third kind. The mass and Brinkman momentum conservation equations in the fluidic domain and the coupled energy conservation in both the solid and fluidic domain are solved analytically using the local thermodynamic equilibrium model, so as to derive closed‐form expressions for the velocity in the fluid and the temperature both in the fluid and solid walls in terms of relevant parameters. Suitable combinations of influencing factors, namely the geometric parameters of the system, fluid, flow, and substrate properties are identified for which global entropy generation rate is minimized. The findings may be helpful in the design of thermal systems frequently used in diverse engineering applications having heat transfer in the solid wall being a crucial parameter.

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“…In their study, the effect of various parameters as volume fraction, Reynolds numbers and morphologies are investigated. Borah et al (2019) investigated numerically the effect of nonuniform heating on the conjugate heat transfer in a duct filled with nanofluid by using TPM. Barnoon et al (2019) investigated numerically the entropy generation of various nanofluid flows in the region among two concentric pipes having magnetic force using SPM and TPM.…”

Section: Introductionmentioning

confidence: 99%

Shell and tube heat exchanger thermal-hydraulic analysis equipped with baffles and corrugated tubes filled with non-Newtonian two-phase nanofluid

Arani

Moradi

2020

HFF

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Purpose Using turbulators, obstacles, ribs, corrugations, baffles and different tube geometry, and also various arrangements of these components have a noticeable effect on the shell and tube heat exchangers (STHEs) thermal-hydraulic performance. This study aims to investigate non-Newtonian fluid flow characteristics and heat transfer features of water and carboxyl methyl cellulose (H2O 99.5%:0.5% CMC)-based Al2O3 nanofluid inside the STHE equipped with corrugated tubes and baffles using two-phase mixture model. Design/methodology/approach Five different corrugated tubes and two baffle shapes are studied numerically using finite volume method based on SIMPLEC algorithm using ANSYS-Fluent software. Findings Based on the obtained results, it is shown that for low-mass flow rates, the disk baffle (DB) has more heat transfer coefficient than that of segmental baffle (SB) configuration, while for mass flow rate more than 1 kg/s, using the SB leads to more heat transfer coefficient than that of DB configuration. Using the DB leads to higher thermal-hydraulic performance evaluation criteria (THPEC) than that of SB configuration in heat exchanger. The THPEC values are between 1.32 and 1.45. Originality/value Using inner, outer or inner/outer corrugations (outer circular rib and inner circular rib [OCR+ICR]) tubes for all mass flow rates can increase the THPEC significantly. Based on the present study, STHE with DB and OCR+ICR tubes configuration filled with water/CMC/Al2O3 with f = 1.5% and dnp = 100 nm is the optimum configuration. The value of THPEC in referred case was 1.73, while for outer corrugations and inner smooth, this value is between 1.34 and 1.57, and for outer smooth and inner corrugations, this value is between 1.33 and 1.52.

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Conjugate heat transfer in a duct using nanofluid by two-phase Eulerian–Lagrangian method: Effect of non-uniform heating

Cited by 29 publications

References 38 publications

Implication of geometrical configuration on heat transfer enhancement in converging minichannel using nanofluid by two phase mixture model: A numerical analysis

Implication of geometrical configuration on heat transfer enhancement in converging minichannel using nanofluid by two phase mixture model: A numerical analysis

Influence of conjugate heat transfer on the minimization of entropy generation for forced convective flow through parallel plate channel filled with porous material

Shell and tube heat exchanger thermal-hydraulic analysis equipped with baffles and corrugated tubes filled with non-Newtonian two-phase nanofluid

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