Numerical simulation of explosion phenomena taking into account non-equilibrium physical-chemical processes

2008 ◽  
pp. 352-360
Author(s):  
V. A. Levin ◽  
V. V. Markov ◽  
S. F. Osinkin ◽  
J. V. Tunik
Keyword(s):  
Numerical Simulation ◽  
Chemical Processes ◽  
Physical Chemical ◽  
Non Equilibrium

scholarly journals Numerical simulation of gas dynamic and physical-chemical processes in hypersonic flows past bodies

2017 ◽  
pp. 387-405
Author(s):  
К.Н. Волков ◽  
В.Н. Емельянов ◽  
А.Г. Карпенко
Keyword(s):  
Numerical Simulation ◽  
High Temperature ◽  
Finite Difference ◽  
Gas Dynamics ◽  
Hypersonic Flows ◽  
Chemical Processes ◽  
Difference Schemes ◽  
Finite Difference Schemes ◽  
Gas Dynamic ◽  
Physical Chemical

Рассматриваются вопросы, связанные с численным моделированием газодинамических и физико-химических процессов, сопровождающих гиперзвуковое обтекание тел различной формы. Математическая модель включает в себя уравнения газовой динамики, записанные для реального газа, и уравнения химической кинетики, описывающие равновесные процессы в высокотемпературном воздухе. Для дискретизации основных расчетных соотношений применяется метод конечных объемов и различные разностные схемы для дискретизации конвективных потоков. Возможности разработанной вычислительной процедуры показываются на примере решения ряда задач физико-химической газовой динамики. Расчеты проводятся с использованием графических процессоров общего назначения. Обсуждается время счета, достигнутое при использовании различных разностных схем и подходов к описанию свойств высокотемпературного воздуха. Numerical simulation of gas dynamic and physical-chemical processes in hypersonic flows past bodies of various shapes is considered. The mathematical model includes the gas dynamics equations of real gases and the equations of chemical kinetics describing equilibrium processes in high-temperature air. The finite volume method and various finite difference schemes for the discretization of convective fluxes are used to discretize the governing equations. The capabilities of the numerical procedure are demonstrated by the solution of a number of problems in physical-chemical gas dynamics. The calculations are performed using general-purpose graphics processor units. The computational time achieved with the use of various finite difference schemes and the approaches to describe the properties of high-temperature air are discussed.

scholarly journals Hybrid Manufacturing based on the combination of Mechanical and Electro Physical–Chemical Processes

Procedia CIRP ◽  
2020 ◽  
Vol 95 ◽  
pp. 649-661
Author(s):  
Bert Lauwers ◽  
Nataliia Chernovol ◽  
Benjamin Peeters ◽  
Dries Van Camp ◽  
Thomas Van Riel ◽  
...  
Keyword(s):  
Chemical Processes ◽  
Hybrid Manufacturing ◽  
Physical Chemical

scholarly journals INVESTIGATION OF SOLID PARTICLES UNDER THE ACTION OF AN ACOUSTIC FIELD / SKYSTYJE ESANČIŲ KIETŲJŲ DALELIŲ SĄVEIKOS AKUSTINIAME LAUKE TYRIMAS

2013 ◽  
Vol 5 (6) ◽  
pp. 655-658
Author(s):  
Egidijus Mykolaitis ◽  
Andrius Styra ◽  
Vladas Vekteris
Keyword(s):  
Water Treatment ◽  
Ground Water ◽  
Acoustic Field ◽  
Chemical Industry ◽  
Iron Concentration ◽  
Chemical Processes ◽  
Solid Particles ◽  
Common Elements ◽  
Physical Chemical

Iron is one of the most common elements in ground water. Bythe HN 24:2003 iron concentration in water can‘t be higher than200 μg/l. Water treatment with an acoustic field is a very relevanttopic. Acoustic field is widely used in industrion, medicine,chemical industry and manufacturing. When water is affectedby ultrasound, physical-chemical processes begin. Ultrasoundvibrations lead to dispersion, degasation and coagulation. Ironparticles connect to each other when distance between them istwo times bigger then their own radius. R = 2R. And if thisprocess continues particles connect one by one. In this article teststand and methodics using ultrasonic piezoceramic are shown. Santrauka Geležis – dažniausiai požeminiuose vandenyse aptinkama priemaiša, kuri prastina geriamojo vandens savybes, todėl būtina bendrosios geležies koncentraciją sumažinti iki 0,2 mg/l. Vienas iš geležies šalinimo būdu yra paremtas ultragarso panaudojimu. Straipsnyje glaustai aptarti bendrosios geležies būviai vandenyje, jos šalinimo metodai ir pateikta eksperimentinė metodika. Eksperimentas atliktas naudojant skirtingų dažnių garso bangas nuo 8 kHz iki 20 kHz diapazone. Akustinio lauko daromai įtakai nustatyti, naudojant skirtingų dažnių garso bangas, buvo panaudoti trys skirtingi vandens debitai. Iš gautų rezultatų suformuluotos išvados.

Use of Wood Biomass in Slovakia

2014 ◽  
Vol 1001 ◽  
pp. 126-130
Author(s):  
Tomáš Bakalár ◽  
Henrieta Pavolová ◽  
Milan Búgel ◽  
Ľubica Kozáková
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
Organic Material ◽  
Chemical Processes ◽  
Wood Chips ◽  
Wood Biomass ◽  
Biochemical Processes ◽  
Physical Chemical ◽  
Thermochemical Processes

Biomass is organic material, the second most important source of energy. Biomass is a renewable energy source. Wood biomass is used as source of energy for heating in many regions in Slovakia. It is because of its availability. Wood biomass is an easily accessible and affordable source of energy. At present, thermochemical processes, biochemical processes and physical-chemical processes are used for biomass utilization. In the article a suitable technology for combustion of wood chips is proposed. It consists of five main technological parts: transport of wood chips, silo, combustion boiler, and stack.

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