共查询到20条相似文献,搜索用时 328 毫秒
1.
Daneshvar Garmroodi M. R. Ahmadpour A. Hajmohammadi M. R. Gholamrezaie S. 《Journal of Thermal Analysis and Calorimetry》2020,141(5):2127-2143
Journal of Thermal Analysis and Calorimetry - In the present study, laminar natural convection of a non-Newtonian ferrofluid inside an elliptical porous cavity was numerically simulated in the... 相似文献
2.
Saleh Shahin Pirouzfar Vahid Alihosseini Afshar 《Journal of Thermal Analysis and Calorimetry》2019,136(4):1817-1830
Journal of Thermal Analysis and Calorimetry - In this study, a refrigeration cycle was simulated with different refrigerants in a petrochemical plant in Iran. Using Aspen HYSYS Software, necessary... 相似文献
3.
Alizadeh Kaklar Zahra Ansari Mohammad Reza 《Journal of Thermal Analysis and Calorimetry》2019,135(3):1881-1890
Journal of Thermal Analysis and Calorimetry - Two-phase flow was simulated within the effervescent atomizer by the volume of fluid interface tracing model. Different gas-to-liquid mass ratios... 相似文献
4.
Journal of Thermal Analysis and Calorimetry - Nanofluid natural convection inside a cavity with a porous square obstacle in the presence of magnetic field is simulated by lattice Boltzmann method.... 相似文献
5.
Chen Haiji Saleem S. Ghaderi Mohammad 《Journal of Thermal Analysis and Calorimetry》2021,145(4):2261-2276
Journal of Thermal Analysis and Calorimetry - The heat transfer of a nanofluid in a square enclosure is numerically simulated using FORTRAN software in this paper, by considering the radiation... 相似文献
6.
Singh Mayur Pratap Arora Kanwer Singh Shajan Nikhil Pandu Sangeetha Ranga Shome Mahadev Kumar Rajneesh Shukla Dinesh 《Journal of Thermal Analysis and Calorimetry》2019,137(4):1155-1167
Journal of Thermal Analysis and Calorimetry - Continuous cooling transformation diagrams were obtained for a simulated coarse-grain heat-affected zone of API X-80 and X-65 steels using Gleeble-3800... 相似文献
7.
Abdulagatov Ilmutdin M. Abdulagatova Zumrud Z. Kallaev Suleiman N. Bakmaev Abumuslim G. Omarov Zairbek M. 《Journal of Thermal Analysis and Calorimetry》2020,139(1):519-525
Journal of Thermal Analysis and Calorimetry - In this paper, a typical combined cycle power generation unit in Iran is simulated by a mathematical method in order to perform sensitivity analysis on... 相似文献
8.
Mozaffari Masoud Karimipour Arash D’Orazio Annunziata 《Journal of Thermal Analysis and Calorimetry》2019,137(1):229-243
Journal of Thermal Analysis and Calorimetry - In this study, the mixed convection of flow in a microchannel containing nanofluid is simulated by the Lattice Boltzmann Method. The... 相似文献
9.
Ibrahim Muhammad Saeed Tareq Alshehri Ahmed Mohammed Chu Yu-Ming 《Journal of Thermal Analysis and Calorimetry》2021,144(6):2403-2421
Journal of Thermal Analysis and Calorimetry - This paper simulated the free convective heat transfer (CHT) and generation of entropy (GOE) of a non-Newtonian fluid (NNF) in a square chamber using... 相似文献
10.
Nohooji Ali Bagheri Toghraie Davood Pourfattah Farzad Akbari Omid Ali Mashayekhi Ramin 《Journal of Thermal Analysis and Calorimetry》2020,140(2):843-858
Journal of Thermal Analysis and Calorimetry - In the present study, the flow field and heat transfer have been simulated numerically inside a channel. The channel is under the constant heat flux.... 相似文献
11.
Hayat T. Nisar Z. Alsaedi A. Ahmad B. 《Journal of Thermal Analysis and Calorimetry》2021,143(3):1867-1880
Journal of Thermal Analysis and Calorimetry - Peristalsis of nanofluid is significant in cancer treatment, ulcer treatment and industrial equipment. This study simulated the MHD peristaltic... 相似文献
12.
Wu Dun Zhang Wenyong Fu Biao Hu Guangqin 《Journal of Thermal Analysis and Calorimetry》2019,136(5):2017-2031
Journal of Thermal Analysis and Calorimetry - In this study, three coal samples (long flame coal/LFC, coking coal/CC, and anthracite/AC) from the same coal seam in Huaibei coalfield were simulated... 相似文献
13.
The denitration of several chemical compositions of simulated HRLW (highly radioactive liquid waste) was performed using formic acid as reducing agent. Precipitates formed during the denitration of simulated HRLW were analyzed using X-ray diffraction and57Fe Mössbauer spectroscopy. Goethite and amorphous fraction were the principal phases in these precipitates. It was found that the chemical composition of simulated HRLW and the experimental conditions of denitration have more influence on the crystallinity and the particle size than on the phase composition of the precipitates. Thermal treatment of denitrated precipitates caused the solid state transformation of goethite+amorphous fraction into hematite. The values of hyperfine magnetic field (HMF) of hematite were decreased, thus indicating the substitution of Fe3+ ions with other metal cations. 相似文献
14.
Thermal expansion and impurity effects on lattice thermal conductivity of solid argon 总被引:1,自引:0,他引:1
Thermal expansion and impurity effects on the lattice thermal conductivity of solid argon have been investigated with equilibrium molecular dynamics simulation. Thermal conductivity is simulated over the temperature range of 20-80 K. Thermal expansion effects, which strongly reduce thermal conductivity, are incorporated into the simulations using experimentally measured lattice constants of solid argon at different temperatures. It is found that the experimentally measured deviations from a T(-1) high-temperature dependence in thermal conductivity can be quantitatively attributed to thermal expansion effects. Phonon scattering on defects also contributes to the deviations. Comparison of simulation results on argon lattices with vacancy and impurity defects to those predicted from the theoretical models of Klemens and Ashegi et al. demonstrates that phonon scattering on impurities due to lattice strain is stronger than that due to differences in mass between the defect and the surrounding matrix. In addition, the results indicate the utility of molecular dynamics simulation for determining parameters in theoretical impurity scattering models under a wide range of conditions. It is also confirmed from the simulation results that thermal conductivity is not sensitive to the impurity concentration at high temperatures. 相似文献
15.
干燥段是生物质热解的第一个过程.采用热分析仪研究了杉木木屑干燥段质量和热量的变化,推导了非等温干燥动力学模型,探讨了热质传输机理.结果表明,随着温度的升高,木屑含湿量迅速下降,80℃左右出现一个明显的失重峰;非等温干燥动力学Page模型能很好地模拟木屑干燥过程,木屑干燥活化能为12.6 kJ/mol;水分传输与热量传递... 相似文献
16.
17.
J. G. Fantidis 《Journal of Radioanalytical and Nuclear Chemistry》2012,293(1):95-101
A transportable thermal neutron radiography system, incorporating a compact proton accelerator as neutron source has been simulated using the MCNP4B code. The neutron source will be produced via the 7Li(p,n)7Be reactions by a 2.5?MeV, 10?mA proton beam into a thick lithium target. Variable values for the collimator ratio were calculated. Thermal neutron radiography parameters are comparable to the research nuclear reactors. Sapphire filter was treated in order to improve the results. Simple and advanced neutron shielding materials considered which was further enhanced with layers of bismuth. The system was compatible with the European Union Directive on ??Restriction of Hazardous Substances?? (RoHS) 2002/95/EC, hence excluding the use of cadmium and lead. 相似文献
18.
《Analytical letters》2012,45(14):1759-1775
Abstract The behaviour of plastics, namely, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyamide and some copolymers, was studied in a combustion chamber in which the conditions of large-scale fires were simulated. Volatile combustion products were frozen-out or analyzed directly on two columns, one packed with Porapak Q and the other capillary column coated with squalane or CP Sil 5 CB. Carbonyl compounds were determined as the 2,4-dinitro-phenyl hydrazones on an OV-101 stationary phase. Thermal conductivity and flame ionization detectors were used. The decomposition products were identified either on the basis of retention data (retention indices) or by combined capillary GC-MS. The data obtained are used for the cataloguing of plastics from the point of view of their product toxicity during fires. 相似文献
19.
S. Casu S. Galvagno A. Calabrese G. Casciaro M. Martino A. Russo Sabrina Portofino 《Journal of Thermal Analysis and Calorimetry》2005,80(2):477-482
Refuse derived fuels (RDF) characterization and pyrolysis behaviour, carried out by means of thermogravimetric analysis, infrared and mass spectroscopy, are presented. Thermal degradation of RDF takes place through three main mass loss stages; the analyses of evolved gas allow us to discriminate the contributions of the different fractions (paper, LDPE, wood, rubber, etc.) to the global decomposition. Furthermore thermogravimetry (TG) was used for the determination of kinetic parameters, using the differential method. In order to set up the conditions of production of a good quality pyrolysis gas, the operating conditions of RDF in a pyrolysis reactor have been simulated. Data show that the volatile fraction grows with the temperature, together with the relative conversion, and that light volatile fraction (hydrogen, ethyne, etc.) gets richer, at the expense of superior homologous hydrocarbons. 相似文献
20.
pH-dependent x-ray absorption spectra of aqueous boron oxides 总被引:1,自引:0,他引:1
Duffin AM Schwartz CP England AH Uejio JS Prendergast D Saykally RJ 《The Journal of chemical physics》2011,134(15):154503
Near edge x-ray absorption fine structure (NEXAFS) spectra at the boron K-edge were measured for aqueous boric acid, borate, and polyborate ions, using liquid microjet technology, and compared with simulated spectra calculated from first principles density functional theory in the excited electron and core hole (XCH) approximation. Thermal motion in both hydrated and isolated molecules was incorporated into the calculations by sampling trajectories from quantum mechanics∕molecular mechanics simulations at the experimental temperature. The boron oxide molecules exhibit little spectral change upon hydration, relative to mineral samples. Simulations reveal that water is arranged nearly isotropically around boric acid and sodium borate, but the calculations also indicate that the boron K-edge NEXAFS spectra are insensitive to hydrogen bonding, molecular environment, or salt interactions. 相似文献