New combined heat transfer enhancement techniques used in laminar flow through non-circular ducts

Ranjan, Hrishiraj; Bharti, Anand Kumar; Emani, Madhu Sruthi; Meyer, Josua P.; Saha, Sujoy Kumar

doi:10.1016/j.applthermaleng.2019.114325

Cited by 13 publications

(4 citation statements)

References 32 publications

(38 reference statements)

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“…/A = k(Tw -Ts)+ h(Tw -Ts) + ε(Tw 4 -Ts 4 ) (11) The heat flux of conduction, convection or radiation is lower when the difference between the tank temperature and ambient temperature (Tw -Ts) is smaller. The lower heat flux cause lower heat transfer area (Ranjan et al 2019).…”

Section: Fig 5 Effects Of Variables On Bleve Of Butyl Acrylatementioning

confidence: 99%

Emission rates, ALOHA simulation and Box-Behnken design of accidental releases in butyl acrylate tank - case study

Saloglu

Dertli

Mohammadi

et al. 2022

Production Engineering Archives

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The leakage of hazardous compounds in chemical industries has always been one of the factors threatening workers, plants, and the environment. Among them, butyl acrylate is one of the most harmful materials that are widely used in chemical plants. In the present study, a butyl acrylate tank located in a real tank farm in Kocaeli-Turkey was analyzed for the examination of emissions and trinitrotoluene (TNT) equivalent explosion model of the vapor cloud. Areal Locations of Hazardous Atmospheres (ALOHA) program was used to define threat zones of butyl acrylate leakage based on different scenarios, such as a leakage from the tank without fire, burning as a jet fire, and also burning as a fireball during Boiling Liquid Expanding Vapor Explosion (BLEVE). In addition, since the most important parameters that enhance the effects of explosion and the spread of volatile organic compounds (VOCs) are wind speed, filling ratio of the tanks, and temperature, the interaction of these parameters on the threat zones and the highest threat zones of explosions were investigated using the Box-Behnken experimental design and one-way Analysis of Variance (ANOVA), respectively. As butyl acrylate, one of the most dangerous chemicals for industrial facilities, and its explosion effects have not been studied so far, it can be safely mentioned that this paper representing the first study in the literature is highly original and novel.

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Section: Fig 5 Effects Of Variables On Bleve Of Butyl Acrylatementioning

confidence: 99%

Emission rates, ALOHA simulation and Box-Behnken design of accidental releases in butyl acrylate tank - case study

Saloglu

Dertli

Mohammadi

et al. 2022

Production Engineering Archives

View full text Add to dashboard Cite

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“…The design concept of the calming section is acquired from Ghajar and Tam [76] and Tam and Ghajar [77]. A calibrated U-tube manometer having a measuring range between 0 and 150 mm of Hg is used to measure the pressure difference in the test section [78][79][80][81][82][83]. The two ends of the manometer are attached to the test section at a distance of 2100 mm with the help of smooth holes having a diameter 0.10 times the diameter of the test section tube drilled in the channel to ensure the smooth and continuous flow of working fluid and accuracy in the measurement without any losses.…”

Section: Experimental Test Rig and Proceduresmentioning

confidence: 99%

Turbulent Flow Heat Transfer through a Circular Tube with Novel Hybrid Grooved Tape Inserts: Thermohydraulic Analysis and Prediction by Applying Machine Learning Model

et al. 2021

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The present experimental work is performed to investigate the convection heat transfer (HT), pressure drop (PD), irreversibility, exergy efficiency and thermal performance for turbulent flow inside a uniformly heated circular channel fitted with novel geometry of hybrid tape. Air is taken as the working fluid and the Reynolds number is varied from 10,000 to 80,000. Hybrid tape is made up of a combination of grooved spring tape and wavy tape. The results obtained with the novel hybrid tape show significantly better performance over individual tapes. A correlation has been developed for predicting the friction factor (f) and Nusselt number (Nu) with novel hybrid tape. The results of this investigation can be used in designing heat exchangers. This paper also presented a statistical analysis of the heat transfer and fluid flow by developing an artificial neural network (ANN)-based machine learning (ML) model. The model is trained based on the features of experimental data, which provide an estimation of experimental output based on user-defined input parameters. The model is evaluated to have an accuracy of 98.00% on unknown test data. These models will help the researchers working in heat transfer enhancement-based experiments to understand and predict the output. As a result, the time and cost of the experiments will reduce.

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“…As it is known, the passive mechanism has been preferred in the flow duct since it generates swirls near the transferring surface and has little energy consumption compared to other types. Therefore, researchers have strived to enhance this field by adopting effective designs for the ducts [1,2].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Laminar Flow in Non-Circular Ducts: A Comprehensive CFD Analysis

Hameed,

Mohammed,

Abbas

2023

JSE

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This study presents a detailed Computational fluid dynamics (CFD) analysis, focusing on optimizing laminar flow within non-circular ducts, specifically those with square, rectangular, and triangular configurations. The study centers on the effective use of mesh quality and size in these ducts, a factor which is previously underrepresented in those CFD studies that predominantly emphasized turbulent rather than laminar flows. With the help of finite element approach, this study compares the performance of these non-circular ducts, employing Reynolds numbers ranging from 1600 to 2000 and mesh sizes of 6, 12, and 18 mm. A ribbed duct style, arranged in a hybrid manner, is adopted to further this study. Analysis in this paper applied the Single predictive optimization (SPO) technique to the identification of the K-ε-Standard as the preferred viscosity model and a hybrid rib distribution as optimal within the triangular duct configuration. Parameters of a Reynolds number of 1600 and a mesh size of 18 mm emerged as the most effective values for this duct style. Then, the attained results of the Analysis of variance (ANOVA) indicated the F-Criterion's insignificance for Reynolds laminar levels, rendering the laminar viscosity model less relevant within the test section. Additionally, the implementation of the Six sigma procedure (SSP) markedly enhanced both the performance factor (PF) and turbulence intensity, which were observed at 4.90% and 146.77%, respectively. This improvement was most notable in the triangular duct, characterized by rib heights of 66 mm (semi-circle), 66 mm (rectangular), and 38.126 mm (triangular).

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New combined heat transfer enhancement techniques used in laminar flow through non-circular ducts

Cited by 13 publications

References 32 publications

Emission rates, ALOHA simulation and Box-Behnken design of accidental releases in butyl acrylate tank - case study

Emission rates, ALOHA simulation and Box-Behnken design of accidental releases in butyl acrylate tank - case study

Turbulent Flow Heat Transfer through a Circular Tube with Novel Hybrid Grooved Tape Inserts: Thermohydraulic Analysis and Prediction by Applying Machine Learning Model

Optimization of Laminar Flow in Non-Circular Ducts: A Comprehensive CFD Analysis

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