Determination of condensation heat transfer inside a horizontal smooth tube

Rabiee, R.; Désilets, Martin; Proulx, Pierre; Ariana, Mohsen; Julien, Marjorie

doi:10.1016/j.ijheatmasstransfer.2018.04.012

Cited by 15 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, this model is more suitable for annular flow. 30 For stratified flow as discussed above, Shah's model performs unsatisfactorily, especially at low vapor quality regions. 31 Therefore, a condenser model based on flow patterns is needed.…”

Section: Heat Transfer Modelmentioning

confidence: 99%

Modeling and numerical investigation on the effects of filling ratio in a large separate heat pipe loop

Kuang

Wang

2021

Intl J of Energy Research

View full text Add to dashboard Cite

Large separate heat pipe is a potential selection to establish the passive cooling system to remove decay heat from the Spent Fuel Pool. In this system, heat pipes are expected to work properly and effectively for a long time without human intervention. Due to the physical dimensions and structures, flow patterns, and fluid distribution in large-scale heat pipes differ from those in conventional ones. Based on the condensation flow patterns, a flow condensation model is presented. Then, a separate heat pipe model considering filling ratio effects is developed. Using the new model, the mean absolute errors of simulation are 5.5% (water), 5.1% (ammonia), and 4.3% (R134a). While in the conventional condensation model, these errors are 29.4%, 9.7%, and 10%. It is found

show abstract

Section: Heat Transfer Modelmentioning

confidence: 99%

Modeling and numerical investigation on the effects of filling ratio in a large separate heat pipe loop

Kuang

Wang

2021

Intl J of Energy Research

View full text Add to dashboard Cite

show abstract

“…Rabiee et al [27] flow condensation inside a smooth horizontal tube was simulated. Moreover, the effect of some parameters such as mass flux, tube hydraulic diameter, vapor quality and difference between the wall and saturation temperature on the heat transfer coefficient were investigated.…”

Section: Publication Remarksmentioning

confidence: 99%

Level-Set Interface Description Approach for Thermal Phase Change of Nanofluids

et al. 2022

View full text Add to dashboard Cite

Simulations of thermally driven phase change phenomena of nanofluids are still in their infancy. Locating the gas–liquid interface location as precisely as possible is one of the primary problems in simulating such flows. The VOF method is the most applied interface description method in commercial and open-source CFD software to simulate nanofluids’ thermal phase change. Using the VOF method directs to inaccurate curvature calculation, which drives artificial flows (numerical non-physical velocities), especially in the vicinity of the gas–liquid interface. To recover accuracy in simulation results by VOF, a solver coupling VOF with the level-set interface description method can be used, in which the VOF is employed to capture the interface since it is a mass conserving method and the level-set is employed to calculate the curvature and physical quantities near the interface. We implemented the aforementioned coupled level-set and VOF (CLSVOF) method within the open-source OpenFOAM® framework and conducted a comparative analysis between CLSVOF and VOF (the default interface capturing method) to demonstrate the CLSVOF method’s advantages and disadvantages in various phase change scenarios. Using experimental mathematical correlations from the literature, we consider the effect of nanoparticles on the base fluid. Results shows that the new inferred technique provides more precise curvature calculation and greater agreement between simulated and analytical/benchmark solutions, but at the expense of processing time.

show abstract

“…Among different classes of interface-capturing approach, VOF can be considered as the default implemented one in OpenFOAM. It is also used in numerous studies to simulate flow boiling of nanofluids and thermally–driven phase change phenomena [ 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. Abedini et al [ 26 ] investigated the subcooled boiling of alumina-water nanofluid in both a vertical concentric annulus and vertical tube using the VOF technique and mixture model, demonstrating that this approach is capable of accurately predicting the temperature distribution and axial vapor volume percentage.…”

Section: Introductionmentioning

confidence: 99%

A Benchmark Evaluation of the isoAdvection Interface Description Method for Thermally–Driven Phase Change Simulation

2022

View full text Add to dashboard Cite

A benchmark study is conducted using isoAdvection as the interface description method. In different studies for the simulation of the thermal phase change of nanofluids, the Volume of Fluid (VOF) method is a contemporary standard to locate the interface position. One of the main drawbacks of VOF is the smearing of the interface, leading to the generation of spurious flows. To solve this problem, the VOF method can be supplemented with a recently introduced geometric method called isoAdvection. We study four benchmark cases that show how isoAdvection affects the simulation results and expose its relative strengths and weaknesses in different scenarios. Comparisons are made with VOF employing the Multidimensional Universal Limiter for Explicit Solution (MULES) limiter and analytical data and experimental correlations. The impact of nanoparticles on the base fluid are considered using empirical equations from the literature. The benchmark cases are 1D and 2D boiling and condensation problems. Their results show that isoAdvection (with isoAlpha reconstruct scheme) delivers a faster solution than MULES while maintaining nearly the same accuracy and convergence rate in the majority of thermal phase change scenarios.

show abstract

Determination of condensation heat transfer inside a horizontal smooth tube

Cited by 15 publications

References 16 publications

Modeling and numerical investigation on the effects of filling ratio in a large separate heat pipe loop

Modeling and numerical investigation on the effects of filling ratio in a large separate heat pipe loop

Level-Set Interface Description Approach for Thermal Phase Change of Nanofluids

A Benchmark Evaluation of the isoAdvection Interface Description Method for Thermally–Driven Phase Change Simulation

Contact Info

Product

Resources

About