Cooling Capacity of Coconut Oil, Palm Oil, and a Commercial Petroleum Oil by Solving the Heat Conductivity Inverse Problem

Kobasko, N. I.; Batista, A. A.; Canale, Lauralice de Campos Franceschini; Totten, George E.; Dobryvechir, V. V.

doi:10.1520/mpc20120047

Cited by 11 publications

(16 citation statements)

References 2 publications

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“…Measuring transition temperature from film boiling to nucleate boiling and evaluating heat transfer coefficient at this temperature, it is possible to calculate the second critical heat flux density q cr2 . The first critical heat flux density is evaluated then from the well known correlation q cr2 /q cr1 =0.2 [6][7][8]. Heat transfer coefficients (HTC) are evaluated by solving inverse problem [9].…”

Section: Simplified Procedures For Evaluating Critical Heat Flux Densimentioning

confidence: 99%

Research on Maximizing Critical and Reducing Initial Heat Flux Densities to Eliminate Any Film Boiling and Minimize Distortion During Quenching

Kobasko¹,

Moskalenko

Lohvynenko

et al. 2017

EUREKA: Physics and Engineering

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In the paper the results of testing three types of FUCHS oils: Thermisol QH 120, Thermisol QH 10 and Thermisol QB 46 are discussed. The main attention is paid to critical heat flux densities evaluation because they create a basis for optimizing cooling intensity of any liquid quenchant. In the paper is underlined that any film boiling during quenching is undesirable since it is a reason for big distortion and non-uniform surface harness. It is shown that intensive quenching decreases distortion of steel parts during quenching. To eliminate film boiling during quenching in mineral oils, optimal temperature of oil should be chosen which maximize the first critical heat flux density and special additives should be used to decrease initial heat flux by creating surface micro-coating. Along with the evaluation of heat transfer coefficients, critical heat flux densities inherent to liquid quenchant must be measured first to optimize quenching processes. International DATABASE on cooling characteristics of liquid quenchants must include critical heat flux densities, initial heat flux densities, and heat transfer coefficients allowing optimizing and governing quenching processes.

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Section: Simplified Procedures For Evaluating Critical Heat Flux Densimentioning

confidence: 99%

Research on Maximizing Critical and Reducing Initial Heat Flux Densities to Eliminate Any Film Boiling and Minimize Distortion During Quenching

Kobasko¹,

Moskalenko

Lohvynenko

et al. 2017

EUREKA: Physics and Engineering

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“…More recently, Otero et al [8] and Kobasko et al [9] have reported heat transfer coefficient (HTC) values for various vegetable oils that were obtained using a "simplified" computational method [9,10]. Although relatively easy to perform, this method does not readily produce vitally important continuous heat transfer profiles for a quenching medium throughout the cooling process.…”

Section: Introductionmentioning

confidence: 99%

“…Although relatively easy to perform, this method does not readily produce vitally important continuous heat transfer profiles for a quenching medium throughout the cooling process. Such data are much more readily obtained by using an inverse method, such as the finite element methods (FEMs) utilized by many workers and recent studies involving vegetable oils reported by Kobasko et al [9]; Carvalho et al [11]; Jagannesh and Prabhu [12]; Ramesh and Prabhu [13]; and others who have utilized FEMs, to solve the heat transfer problem.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Cooling and Heat Transfer Properties of Quenchants with MATLAB

Meekisho

Otero

Viscaino

et al. 2019

Materials Performance and Characterization

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There is ongoing interest for evaluating the potential of renewable base stocks, such as vegetable oils, to replace petroleum oils as metal quenchants. Perhaps the most critical part of this process is characterizing and comparing the cooling and heat transfer performance of potential quenchant candidates. In this work, cooling curves of two vegetable oils, palm oil and canola oil, were obtained along with a commercially available conventional and an accelerated petroleum quenchant using the so-called Tensi multiple thermocouple probe, with emphasis on the center probe emulating a small probe concept. The lumped-parameter approach was implemented in the MATLAB environment (Mathworks Inc., Natick, MA). Experimental quenching data along with temperature-dependent thermal properties for the Inconel probe material were used to quantify the cooling characteristics and heat transfer properties of two typical vegetable and petroleum oil quenchants. The results obtained exhibited a fundamental difference in the cooling characteristics between the vegetable oils and also between both vegetable oils and the petroleum oil quenchants evaluated. The focus of this article will be on the development of the computational codes and the use of MATLAB to perform these analyses.

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“…More recently, Otero et al [9] and Kobasko et al [10] have reported HTC values for various vegetable oils, which were obtained using a "simplified" computational method [10,11]. Although relatively easy to perform, this method does not readily produce vitally important continuous heat transfer profiles for a quenching medium throughout the cooling process.…”

Section: Introductionmentioning

confidence: 99%

“…Although relatively easy to perform, this method does not readily produce vitally important continuous heat transfer profiles for a quenching medium throughout the cooling process. Such data are much more readily obtained by using an inverse method to solve the heat transfer problem, such as the finite element methods (FEM) utilized by many researches, including recent studies involving vegetable oils reported by Kobasko et al [10], de Souza et al [12], Jagannath and Prabhu [13], and Ramesh and Prabhu [14], among others who have utilized FEM-based approaches.…”

Section: Introductionmentioning

confidence: 99%

Parallelized Particle Swarm Optimization to Estimate the Heat Transfer Coefficients of Palm Oil, Canola Oil, Conventional, and Accelerated Petroleum Oil Quenchants

Fried

Felde

Otero

et al. 2018

Matls. Perf. Charact.

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Cooling Capacity of Coconut Oil, Palm Oil, and a Commercial Petroleum Oil by Solving the Heat Conductivity Inverse Problem

Cited by 11 publications

References 2 publications

Research on Maximizing Critical and Reducing Initial Heat Flux Densities to Eliminate Any Film Boiling and Minimize Distortion During Quenching

Research on Maximizing Critical and Reducing Initial Heat Flux Densities to Eliminate Any Film Boiling and Minimize Distortion During Quenching

Assessment of Cooling and Heat Transfer Properties of Quenchants with MATLAB

Parallelized Particle Swarm Optimization to Estimate the Heat Transfer Coefficients of Palm Oil, Canola Oil, Conventional, and Accelerated Petroleum Oil Quenchants

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