Relevant bibliographies by topics / Unsteady temperature fields

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Unsteady temperature fields'

Author: Grafiati
Published: 3 June 2025
Last updated: 20 July 2025

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Journal articles on the topic "Unsteady temperature fields"

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Yariv, Ehud, and Howard Brenner. "Flow animation by unsteady temperature fields." Physics of Fluids 16, no. 11 (2004): L95—L98. http://dx.doi.org/10.1063/1.1801091.

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YARIV, EHUD. "Displacing small particles by unsteady temperature fields." Journal of Fluid Mechanics 530 (May 10, 2005): 125–34. http://dx.doi.org/10.1017/s0022112005003538.

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SHUAI, S., and J. WANG. "Unsteady temperature fields of monoliths in catalytic converters." Chemical Engineering Journal 100, no. 1-3 (2004): 95–107. http://dx.doi.org/10.1016/j.cej.2004.01.013.

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Biliaieva, V. V., and S. A. Shcherbyna. "Mathematical Modeling of Temperature Fields in Cultivation Structures." Science and Transport Progress, no. 4(108) (December 15, 2024): 13–20. https://doi.org/10.15802/stp2024/316334.

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Purpose. The main purpose of the article is to develop a method for calculating thermal fields in greenhouse soil in the case of its artificial heating. Since the temperature regime in greenhouse soil has a significant impact on plant yields, it is very important, on the one hand, to ensure the required temperature in the soil, and on the other hand, to determine the energy-saving heating regime. Methodology. The method is based on the numerical integration of the heat transfer equation. A two-dimensional heat transfer equation was used to analyze and predict the unsteady process of soil heati
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Demchuk, O. N., and R. A. Starodub. "Determination of unsteady-state temperature fields in multilayered orthotopic plates." Journal of Engineering Physics and Thermophysics 63, no. 4 (1992): 1050–55. http://dx.doi.org/10.1007/bf00853358.

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Wei, Chenghao, Ryozo Ooka, Bingchao Zhang, and Qi Zhou. "Predicting Unsteady Indoor Temperature Distributions by POD-DNN." E3S Web of Conferences 356 (2022): 04028. http://dx.doi.org/10.1051/e3sconf/202235604028.

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In this study, to predict unsteady temperature distributions, POD-DNN was utilized, where DNN was trained to predicted coefficients of POMs. Two strategies, flatten POD-DNN and nested POD-DNN were compared. The flatten POD-DNN provided high accuracy if training data is sufficient, but otherwise very inaccurate. The nested POD-DNN roughly predicted the development of temperature fields even training data was small. The results showed their different sensitivities to the training data size.
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Zhang, Yan, Min Zhang, and Shujuan Qi. "Heat and Mass Transfer in a Thin Liquid Film over an Unsteady Stretching Surface in the Presence of Thermosolutal Capillarity and Variable Magnetic Field." Mathematical Problems in Engineering 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/8521580.

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The heat and mass transfer characteristics of a liquid film which contain thermosolutal capillarity and a variable magnetic field over an unsteady stretching sheet have been investigated. The governing equations for momentum, energy, and concentration are established and transformed to a set of coupled ordinary equations with the aid of similarity transformation. The analytical solutions are obtained using the double-parameter transformation perturbation expansion method. The effects of various relevant parameters such as unsteady parameter, Prandtl number, Schmidt number, thermocapillary numb
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Saastamoinen, J. J. "Unsteady state temperature fields in a slab induced by line sources." International Journal of Heat and Mass Transfer 50, no. 3-4 (2007): 756–65. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2006.07.001.

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Shyu, R. J., and C. K. Hsieh. "Unsteady Natural Convection in Enclosures With Stratified Medium." Journal of Solar Energy Engineering 109, no. 2 (1987): 127–33. http://dx.doi.org/10.1115/1.3268189.

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A numerical solution is given to study the unsteady natural convection in enclosures with stratified medium. Three designs of the enclosure wall are investigated that encompass a wall without insulation on it, insulation placed over the exterior of the wall, and insulation placed over the interior. The enclosed medium is initially stratified in the middle region and the wall temperature is uniform at the high temperature level of the medium. Computation results indicate the superiority of placing the insulation inside to maintain the thermal stratification in the medium. Flow and temperature f
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Ayub, Rashid, Shahzad Ahmad, Muhammad Imran Asjad, and Mushtaq Ahmad. "Heat Transfer Analysis for Viscous Fluid Flow with the Newtonian Heating and Effect of Magnetic Force in a Rotating Regime." Complexity 2021 (July 26, 2021): 1–11. http://dx.doi.org/10.1155/2021/9962732.

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In this article, an unsteady free convection flow of MHD viscous fluid over a vertical rotating plate with Newtonian heating and heat generation is analyzed. The dimensionless governing equations for temperature and velocity fields are solved using the Laplace transform technique. Analytical solutions are obtained for the temperature and components of velocity fields. The obtained solutions satisfy the initial and boundary conditions. Some physical aspects of flow parameters on the fluid motion are presented graphically.
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Dissertations / Theses on the topic "Unsteady temperature fields"

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Lavagnoli, Sergio. "On the Aerothermal Flow Field in a Transonic HP Turbine Stage with a Multi-Profile LP Stator Vane." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/17799.

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The quest for higher performances and durability of modern aero-engines requires the understanding of the complex aero-thermal flow experienced in a multi-row environment. In particular, the high and low pressure turbine components have a great impact into the engine overall performance, and improvements in the turbine efficiencies can only be achieved through detailed research on the three-dimensional unsteady aerodynamics and heat transfer. The present thesis presents an experimental study of the aerothermodynamics in one and a half turbine stage, focusing on: the aero-thermal flow in the ov
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王彥智. "Initial Temperature Field for Unsteady Laminar Forced Convection from an Impulsively Started Rotating Sphere with Isothermal Surface." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/22558785075092302233.

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碩士<br>淡江大學<br>機械工程研究所<br>76<br>Analytic solution by perturbation method for forced convection heat transfer from an impulsively started rotating sphere with isothermal surface is investigatd. For the sake of impulsively start, there is a singularity at the very beginning of motion. 　　The accurate analytic solution for the initial temperature field is obtained by solving the non-linear unsteady energy equation with the method of matched asymptotic expansion to the third order. The solution is in terms of exponential functions and error functions. 　　The time development of the temperature field
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Book chapters on the topic "Unsteady temperature fields"

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Guzik, A., T. Styrylska, and J. Taler. "2D Unsteady Temperature in a Boiler Shell by the Multistage-Multigroup Least Squares Method." In Mathematics of Heat Transfer. Oxford University PressOxford, 1998. http://dx.doi.org/10.1093/oso/9780198503583.003.0016.

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Abstract he paper deals with the mathematical modelling of unsteady temperature fields using data subject to errors in the elements of technological systems. When the mathematical model contains measured results, using the adjustment procedure, we can verify its accuracy and obtain a more realistic solution from a statistical view point. The adjustment procedure is very often based upon the least squares principle. When numerical methods are used to get the solution, the coefficient matrix of the set of constraint equations is sparse and simplifications in the adjustment procedure are afforded. The multistage-multigroup approach to modelling of unsteady temperature fields has been derived. The efficiency of the algorithm allows on-line estimation of them. The procedure was employed for determining the unsteady temperature field in a boiler shell.
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Ahmedai, Salma, Precious Sibanda, Sicelo Goqo, and Uthman Rufai. "Three-Dimensional Numerical Computational Model for an Unsteady Hybrid Nanofluids Past Stretching MHD Rotating Sheet." In Computational Simulation and Experimental Techniques for Nanofluid Flow. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815223705124010004.

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This paper presents a numerical approach to solving unsteady hybrid nanofluid flow problems using the overlapping grid multi-domain bivariate spectral simple iteration method (OMD-BSSIM). The method utilizes the Chebyshev spectral collocation approach to approximate the derivatives in the overlapping grid of space and non-overlapping grid of time, which allows for handling the two domains (multi-domain) problem. In this paper, we propose using the overlapping bivariate spectral method in combination with the simple iteration method instead of the commonly used quasi-linearization, relaxation, or local linearization schemes. The governing equations are transformed into a system of nonlinear partial differential equations using similarity transformations. The OMD-BSSIM is applied to investigate the heat transfer rate for MHD, unsteady GNP − Fe3O4/H2O, and TiO2 - Fe3O4/H2O hybrid nanofluids flow, with projection angles ranging from 0∘to90∘, representing the influence of different magnetic fields. The numerical solution is obtained using OMDBSSIM implemented in MATLAB. We use R visualization techniques and graphs to analyze the relationship between the skin friction coefficients, local Nusselt number, and Sherwood number of the hybrid nanofluids and some parameters. The results show that the increase in the volume fraction of GNP nanoparticle has a greater effect on the temperature profile than TiO2 nanoparticle. Additionally, notable positive relationships were observed for the rotation parameter, while the stretching parameter had a negative impact on certain outcome measures.
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Yan, B., and I. Pop. "Unsteady Forced Convective Heat Transfer About a Sphere in a Porous Medium." In Mathematics of Heat Transfer. Oxford University PressOxford, 1998. http://dx.doi.org/10.1093/oso/9780198503583.003.0041.

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Abstract In this paper comprehensive numerical computations are carried out for the unsteady forced convective flow past a sphere which is embedded in a porous medium. The sphere is suddenly heated and subsequently maintained at a constant temperature which is greater than the ambient temperature. The velocity field is given by the Darcy’s law, whilst the temperature distribution around the sphere is governed by the unsteady energy equation. The evolution of the isotherms with time for different values of the Peclet number are presented.
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"Unsteady MHD Fluid Flow." In Advances in Chemical and Materials Engineering. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-5335-6.ch005.

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This chapter introduces a thermal and flow analysis of an unsteady compressible nanofluid flow and heat transfer utilizing a nanofluid founded on the Brinkmann model in the presence of a varying magnetic field. An analytical approach is used to solve the problem's nonlinear differential equations. Nanofluid viscosity and effective thermal conductivity are calculated using the Brinkmann correlation. Nusselt number and skin friction coefficient are provided. Impacts of active parameters such as Hartmann number, pressure number, and heat source parameter are discussed. The results for temperature distribution and velocity profile, Nusselt number, and skin friction coefficient are presented employing the Galerkin technique.
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Lawal, Khadijah, and Haruna Jibril. "Magneto-Hydrodynamic Natural Convection Flow in a Concentric Annulus with Ramped Temperature and Ramped Motion of the Boundaries." In Heat Exchangers. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.100827.

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An unsteady MHD flow of a temperature dependent heat source/sink in an annulus due to ramped motion and ramped temperature of the boundaries has been analyzed. The partial differential equations of the fluid flow are formulated taking into account the ramped temperature and ramped velocity of the inner cylinder. The closed form solution are obtained for three cases of the magnetic field being fixed relative the fluid, cylinder and when the velocity of the magnetic field is less than the velocity of the moving cylinder. The problem is solved using Laplace transform technique to obtain the Laplace domain solution and Riemann sum approximation to obtain the time domain solution. The effect of the governing parameters on the fluid flow are illustrated graphically. It is found that, Hartmann number has a retarding effect on the skin friction at the outer surface of the inner cylinder and mass flow rate. It also decreases fluid velocity for cases K=0.0andK=0.5 the reverse effect is noticed for case K=1.0. Increase in Hartmann number lead to an increase in skin friction at the inner surface of the outer cylinder for case K=0.0 but decreases it for cases K=0.0andK=0.5.
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Conference papers on the topic "Unsteady temperature fields"

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Wang, Jian-Xin, Shi-Jin Shuai, and Ren-Jun Zhuang. "Experiment and Numerical Simulation of Unsteady Temperature Fields in Automotive Catalytic Converters." In SAE International Fall Fuels & Lubricants Meeting & Exhibition. SAE International, 2001. http://dx.doi.org/10.4271/2001-01-3563.

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Prato, J., B. Lakshminarayana, and N. Suryavamshi. "Steady and Unsteady Three-Dimensional Flow Field Downstream of an Embedded Stator in a Multistage Axial Flow Compressor: Part 1 — Unsteady Velocity Field." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-521.

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A comprehensive investigation of the three-dimensional unsteady flow and thermal field downstream of an embedded stator in a multistage compressor, acquired with a high-response hot-film probe and aspirating probe, is presented and analyzed. Some of the earlier data (five-hole probe and high-response Kulite probe) from the same compressor is used with the present data to provide an integrated and comprehensive interpretation of the flow and thermal fields. The emphasis is on the unsteady flow, unsteady thermal, and integrated flow fields. Part 1 covers the description of the facility and the d
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Agnew, B., R. L. Elder, and M. Terrel. "An Investigation of the Response of Temperature Sensing Probes to an Unsteady Flow Field." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-223.

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The response of temperature measuring devices to pulsating flow fields has been a source of concern to compressor designers. A conventional temperature sensing device is known to respond to the highly energetic wake flow leaving a rotor and due to the long thermal time constant of the probe a temperature lying between the hot wake temperature and the relatively cooler main stream temperature tends to be indicated. This indicated temperature can be in serious error if included in a calculation to define the energy flux. This work is concerned with a theoretical and experimental examination of t
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Me´nard, Vale´rie, Adel Stitou, Ste´phane Le Masson, David No¨rtersha¨user, and Pierre Millan. "Velocity and Temperature Fields Measurement of Natural Convection Flow Using Thermochromic Liquid Crystals." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72153.

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Based on a particular property of some liquid crystal to reflect a specific wavelength for a specific temperature, Particle Image Velocimetry and Thermometry (PIVT) is a method allowing to measure simultaneously velocity and temperature fields. In a first part, this study discusses PIVT calibration methods and especially the effect of liquid crystal particle deposition on hue and intensity response. An experimental set-up is designed and the results confirm the high variations of intensity response with time and the need to use a simple relationship between hue and temperature. In a second pla
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Moraga, Nelson O., Luis A. Silva, and Alfonso Ortega. "Unsteady Natural Convection Heating of a Canned Non-Newtonian Liquid Food." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88402.

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This paper is concerned with the modeling of complex thermal-fluid phenomena that arises during the process of sterilization of canned food. In the sterilization process, food contained with a typical cylindrical can is subjected to a sudden change in temperature as the can is immersed in a steam bath at saturation temperatures of the order of 120 degrees C. Because of this transient heating event, complex transient buoyant motion is initiated in the can and therefore the heating of the food is as a result of diffusion and buoyant or natural convection processes. A Finite Volume method was use
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Shusser, Michael. "The Influence of Thermal Expansion Flow on Droplet Evaporation." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72393.

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It has been demonstrated recently that it follows from conservation of mass that unsteady temperature fields create flow in an incompressible fluid with a temperature-dependent density even in the absence of gravity. The paper studies the influence of thermal expansion flow on spherically symmetric evaporation of an isolated droplet. A model problem of a droplet evaporating at a constant rate is first considered. In this idealized situation one can use the assumption of a thin thermal boundary layer to solve analytically the unsteady moving-boundary heat conduction problem to find the temperat
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Kitamura, Takaaki, Masaharu Kameda, Wataru Watanabe, Kazutaka Horimoto, Kenta Akimoto, and Akihito Akahori. "Measurement of Unsteady Pressure Field in a Turbocharger Compressor Using Pressure-Sensitive Paint." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76267.

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It is necessary to quantitatively resolve the flow field generated in compressors at various operating conditions including the surge. In this study, fast-responding pressure-sensitive-paint (PSP) and temperature-sensitive-paint (TSP) was applied to measurement of steady and unsteady pressure and temperature fields in a turbocharger compressor. The surface pressure of a compressor impeller and the diffuser downstream of the impeller was measured under the rotating speed of 133,000 rpm with various mass flow rate of the inlet. Blue LED strobes were used as the excitation light source for PSP/TS
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Zeb, Muhammad Falak, Masanori Ota, and Kazuo Maeno. "Quantitative Measurement of Temperature Gradient in Natural Heat Convection Using Color-Stripe Background Oriented Schlieren (CSBOS) Technique and Computed Tomography (CT) Method." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-11013.

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Quantitative image analysis and measurement of flow fields in convective heat transfer has great importance for the optimum energy consumption problems. In natural and forced convection phenomena of fluids, the complexity of flow field prevents us from detailed three dimensional (3D) experimental analyses of steady/unsteady dynamics in fluids. These flow fields have locally different density and temperature values and yet to be observed quantitatively. Recent development of the Particle Image Velocimetry (PIV) and Particle Tracking Velocimetry (PTV) techniques lead us to the quantitative inves
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Bagchi, Prosenjit, and Kiritk Kottam. "Unsteady Heat Transfer From a Spherical Particle in Turbulent and Oscillating Ambient Flows." In ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/ht2008-56222.

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Direct Numerical Simulation based on pseudospectral methodology is used to study the effect of freestream turbulence and freestream oscillation on the heat transfer from a sphere. The sphere Reynolds number is in the range 63 to 400, and the ratio of sphere diameter to Kolmogorov scale ranges from 1.08 to 8. The objective is to obtain the unsteady heat transfer from the sphere at finite sphere Reynolds number Re and Prandtl number Pr in presence of a time-dependent ambient flow from the DNS, and compare that with the analytical expression valid for vanishing thermal advection. Results from thr
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Bottini, Henny, Bayindir H. Saracoglu, and Guillermo Paniagua. "Experimental Investigation of Single Roughness Element Effects on Supersonic Boundary Layer Transition." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21673.

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Predicting the characteristics of a transitional boundary layer remains an open challenge in supersonic flow fields. An experimental campaign to understand the effects of a single roughness element on a supersonic laminar boundary layer was designed. Two Mach numbers were tested, 1.6 and 2.3, including two roughness heights, 0.1 mm and 1 mm, over a flat plate. Steady and unsteady wall temperature and pressure levels were recorded to interpret the influence of the wake of the roughness. Heat flux and adiabatic wall temperature trends, temperature and pressure fluctuations RMS trends and time ev
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