Simple heat transfer

8We propose a method to analyze complex physical systems using two-dimensional Cell-DEVS models. These problems 9 are usually modeled with one or more Partial Differential Equations and solved using numerical methods. Our goal is to 10 improve the definition of such problems by mapping them into the Cell-DEVS formalism, which permits easy integration 11 with models defined with other formalisms, and its definition using advanced modeling and simulation tools. To show this, 12 we used two methods for solving PDEs, and deduced the updating rules for their mapping to Cell-DEVS. As our simu-

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“…Obtaining updating rules for two-dimensional heat transfer model (a) Using finite differences method [2].…”

Section: Resultsmentioning

confidence: 99%

“…where T h , and T l are the high and low temperatures of its ends, respectively. A steady heat transfer without heat generation in the body in 2D is represented by the following diffusion equation [2]:…”

Section: Resultsmentioning

confidence: 99%

Modeling physical systems using finite element Cell-DEVS

Saadawi

Wainer

2007

Simulation Modelling Practice and Theory

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“…It is known that the heat transfer level in parts, assemblies and systems of various technical devices largely determines their efficiency, reliability and safety [1,2]. Therefore, the assessment of the heat transfer intensity of flows in gas-dynamic systems of complex configuration at different turbulence levels remains an urgent problem in science and technology.…”

Section: Introductionmentioning

confidence: 99%

Computational and experimental evaluation of heat transfer intensity in channels of complex configuration for gas flow with different levels of turbulence

Plotnikov

Жилкин

Brodov

et al. 2021

J. Phys.: Conf. Ser.

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Disclosure of the physical mechanism of the influence of the turbulence intensity of gas flows on the heat transfer level in pipes of different configurations is an urgent task in the field of heat and power engineering. A brief overview of the literature on this topic is given in the article. A description of the boundary conditions for modeling is presented. The main characteristics of the experimental stand and measuring instruments are described. The purpose of this study is to study the effect of the initial turbulence level of a stationary gas flow on the heat transfer intensity in long pipes with different cross sections. The study is carried out using numerical simulation. The simulation results are qualitatively confirmed using experimental data. The values of the local heat transfer coefficient are shown to increase from 5 to 17% with increasing turbulence intensity (from 2 to 10%) in pipes with different cross sections. The heat transfer intensity in a triangular pipe is found to increase up to 30% compared to a round pipe. It is revealed that there is an up to 15% suppression of heat transfer in a square pipe compared to a round pipe. The data obtained may be useful for the design of flow paths and gas exchange systems for power machines and installations.

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Heat exchange in a chamber apparatus with a circulation circuit during cheese masses production

Voroshchuk,

Kravets,

Krupa

et al. 2022

Visnyk TNTU

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Chamber heat exchangers are used in various branches of the food industry. Different types of stirrers are used in them as the means of intensifying heat transfer. They also give the devices the function of mixing devices. Grinding mechanisms are installed in some designs, which also affect the heat transfer and hydrodynamics of the movement. Grinding and mixing devices are especially widely used in the production of composite products. During heat treatment, uniformity of heating of the whole mass and the same duration of action of the maximum temperature is important for many products. In such cases, it is advisable to use chamber heat exchangers with a circulating circuit for processing thermolabile products. The heat exchange in such a device is complex due to the hydrodynamics of the product. Studies of the heat exchange process in a capacitive device with a circulating circuit are relevant. In particular, the establishment of the criterion equation of heat transfer to determine the heat transfer coefficient from the wall of the device to the product. The article deals with the peculiarities of heat exchange when using chamber heat exchangers with a stirrer and a circulating circuit. The results of research on the heat exchange process at the production of composite products on the basis of cottage cheese are presented. The process of heating the mass is influenced by its movement through the circulating device and in a closed circuit. Therefore, to study the effect of purely mechanical treatment on the heating process of the product, we studied the change in the temperature of the mass at the outlet of the circulation circuit without the supply of a heating agent. According to the results of the research, it was found that the circulation of the product in a closed circuit allows ensuring uniform heating and reduces the duration of the process. And for portions of the product weighing up to 5 kg, the required temperature can be achieved even only through machining. The criterion equation of heat transfer to determine the heat transfer coefficient from the wall to the product was obtained by the method of dimensions. A circulation number is entered, which is the ratio of the volume of the circulating product to the volume mixed by the stirrer.

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Simple heat transfer

Cited by 3 publications

References 0 publications

Modeling physical systems using finite element Cell-DEVS

Modeling physical systems using finite element Cell-DEVS

Computational and experimental evaluation of heat transfer intensity in channels of complex configuration for gas flow with different levels of turbulence

Heat exchange in a chamber apparatus with a circulation circuit during cheese masses production

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