Evaluating and optimizing the geometry of thermal foundation pipes for the utilization of the geothermal energy: Numerical simulation

Khandouzi, Omid; Pourfallah, Mohsen; Yoosefirad, Edris; Shaker, B. S.; Gholinia, M.; Mouloodi, Saeed

doi:10.1016/j.est.2021.102464

Cited by 38 publications

(11 citation statements)

References 21 publications

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“…In the presented work, the K-epsilon model is used to model the turbulence flow. The equations and terms that affect the problem are given below 46 :…”

Section: The Governing Equations (Nanofluid)mentioning

confidence: 99%

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Gholinia

Javidan

Hosseinpour

2022

Advances in Mechanical Engineering

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In this work, we have studied the performance of the cooling system with the presence of graphene oxide (GO) and molybdenum sulfide (MoS2) nanoparticles to reduce heat stress, increase the final efficiency, and maintain the reliability of Diode and IGBT electronic module. Beyond the geometric design of micro-sprays and dimensional changes, as well as the type of cooling fluid effect, the use of nanofluids for the purpose of thermal management of electronic systems will be an interesting and effective innovation. In the simulation parameters, the dimensional ratio of micro-sprays, the rate of cooling flows, and the volume fraction of nanoparticles were investigated. According to the results, considering the spray of the BSM-4N model and the input mass rate of 0.04 kg/s, by increasing the volume fraction of nanoparticles from 0.01 to 0.05, the heat transfer of nanofluid increases, thus leading to an increase in thermal efficiency. In this paper, the thermal effects of GO nanoparticle were significantly more favorable than those of MoS2 nanoparticle. In addition, it was found that by reducing the spray nozzle using installing the blade and simultaneous use of GO nanofluid with volume fraction of 0.05, the temperature inside the module is reduced below 323 K.

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“…In the presented work, the K-epsilon model is used to model the turbulence flow. The equations and terms that affect the problem are given below 46 :…”

Section: The Governing Equations (Nanofluid)mentioning

confidence: 99%

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Gholinia

Javidan

Hosseinpour

2022

Advances in Mechanical Engineering

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“…The nanofluid flow was simulated using the k-𝜀 RNG turbulence model. 19 This model has a better performance compared to the standard model in the simulation of flow under high adverse pressure gradients, separation, and rotational flow. Moreover, mass transfer of momentum from the wall is better predicted in the k-𝜀 RNG turbulence model.…”

Section: Definition Of the Problemmentioning

confidence: 99%

“…Moreover, mass transfer of momentum from the wall is better predicted in the k-𝜀 RNG turbulence model. 19 In Table 2, the different geometries of nanoparticles are provided. In addition, in Table 3, the thermal-physical properties of the base liquid and nanoparticles are specified.…”

Section: Definition Of the Problemmentioning

confidence: 99%

“…Further, some other studies have recently attracted the attention of researchers and are regarded as a model for innovative ideas. [18][19][20][21][22][23][24] This article aimed to examine a twisted strip heat exchanger alongside hybrid nanofluids Ag and TiO 2 with lamina, platelets, and spherical shape factors. This is conducted using ANSYS-FLUENT software and k-𝜀 RNG turbulence model, and the relationship between pressure and velocity could be controlled by the SIMPLE approach.…”

Section: Introductionmentioning

confidence: 99%

“…Likewise, Vidhya et al 17 examined the thermo‐physical properties and heat transfer performance of a heat tube filled with a binary mixture of ZnO‐MgO hybrid nanofluids and indicated that ZnO‐MgO hybrid nanofluid exhibited higher thermo‐physical properties relative to the mere base fluid. Further, some other studies have recently attracted the attention of researchers and are regarded as a model for innovative ideas 18–24 …”

Section: Introductionmentioning

confidence: 99%

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Impact of hybrid nanofluids (Ag‐TiO₂/H₂O) on improving the performance of a heat exchanger with turbulent induction elements

Bisheh

Pourfallah

Gholinia

2022

Engineering Reports

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In this article, the optimization of a twisted strip heat exchanger was explored aiming at enhancing heat transfer. To this end, governing equations using ANSYS‐FLUENT software and nanofluid flow using the k‐ε RNG turbulence model were simulated in the heat exchanger, respectively. The investigated parameters included temperature, pressure, velocity, turbulence kinetic energy (TKE), nanofluid concentration, nanofluid shape factor, Reynolds number, and the diameter of the spherical obstacle on the twisted tape. In addition, the applied nanoparticles were Ag and TiO2, which were combined as a hybrid with a ratio of 50%–50%. Investigations on the surface of the twisted tape with a spherical obstacle revealed a reduction in the temperature while an increase in pressure changes, velocity, and TKE. Moreover, it was specified that the application of lamina‐shaped (non‐spherical) nanofluid has the maximum convection heat transfer coefficient relative to platelets and spherical shapes. The highest heat transfer rate was achieved at a nanofluid concentration of ϕ=0.06. Based on the findings, the heat transfer rate upgraded by increasing the Reynolds number such that the highest heat transfer rate was gained at Reynolds number 18,000. Finally, the heat transfer coefficient was enhanced by approximately 52% by increasing the diameter of the obstacles from 3 to 12 mm.

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Hybrid surveying of radiation and magnetic impacts on Maxwell fluid with MWCNT nanotube influence of two wire loops

et al. 2022

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In this paper, the effects of Maxwell nanoliquid transmission with MWCNT nanotube are investigated over two circular wires with opposite currents and a stretching sheet. The innovation of this paper is the examination of MWCNT nanotube temperature and nanofluid velocity and also magnetic potential and magnetic effect in the three different places of two circular wires on the sheet. The finite element method is utilized for calculating differential equations. By increasing the distance from two wires on the stretching sheet, the amount of MWCNT nanotube temperature increased, and a large vortex forms at the bottom of the sheet. Overall, the MWCNT nanotube velocity around the two circular wires at the beginning of the sheet is 46.09% higher than the middle of the sheet and 20% higher than the end of the sheet, also the MWCNT nanotube magnetic potential around the two circular wires at the beginning of the sheet is 13.40% higher than the middle of the sheet and 23% higher than the end of the sheet. The second part of the essay relates to the using response surface methodology (RSM) method in the Design‐Expert software. Based on the results obtained from the MWCNT nanotube velocity graphs and the heat transfer cantors, and magnetism effects in the Design‐Expert software, the best optimization occurred for u = 0.07, T = 1.15, and H = 4.531.

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Evaluating and optimizing the geometry of thermal foundation pipes for the utilization of the geothermal energy: Numerical simulation

Cited by 38 publications

References 21 publications

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Impact of hybrid nanofluids (Ag‐TiO₂/H₂O) on improving the performance of a heat exchanger with turbulent induction elements

Hybrid surveying of radiation and magnetic impacts on Maxwell fluid with MWCNT nanotube influence of two wire loops

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Evaluating and optimizing the geometry of thermal foundation pipes for the utilization of the geothermal energy: Numerical simulation

Cited by 38 publications

References 21 publications

Effect of two different nano-particles (GO-MoS2) and a new micro-sprayer model on power electronic module for thermal management

Effect of two different nano-particles (GO-MoS2) and a new micro-sprayer model on power electronic module for thermal management

Impact of hybrid nanofluids (Ag‐TiO2/H2O) on improving the performance of a heat exchanger with turbulent induction elements

Hybrid surveying of radiation and magnetic impacts on Maxwell fluid with MWCNT nanotube influence of two wire loops

Contact Info

Product

Resources

About

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Impact of hybrid nanofluids (Ag‐TiO₂/H₂O) on improving the performance of a heat exchanger with turbulent induction elements