Ignition of Wet Wood Particles in the Stream of High-Temperature Gases

Abstract. The mathematical modeling results of the simultaneous processes of heat and mass transfer under the conditions of intense phase changes (melting of ice) during the movement of cryobot have been given. The spatial unevenness of the melting rate of ice has been taken into account. It has been established that the rate of passage of the cryobot depends essentially on its temperature. According to the results of the numerical simulation, considerable cooling of the cryobot sheath has been established. The latter is due to the high endothermic effect of melting ice.

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“…[12] The mathematical statement also includes the corresponding boundary conditions: where Ki -criterion of Kirpichev [13].…”

Section: Hmttsc-2018mentioning

confidence: 99%

Mathematical modeling of the melting of ice under conditions of motion of a heat drill

Zakharova

Purin

2018

MATEC Web Conf.

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“…The system of equations (1-7) was solved under the following boundary conditions (Fig. 1): t=0; 0<x<l; 0<y<H1; T(x,y)=Ts; The problem was solved by the method of finite differences using the implicit four-point difference template with the use of discontinuous coefficients [13,14]. The nonstationary multidimensional Stefan problem was solved by the method of implicit separation of the fusion front [14].…”

Section: Mathematical Formulation Of the Problemmentioning

confidence: 99%

Mathematical modeling of heating of a dimetallic plate by a high-energy concentrated radiation flux

Purin

Zakharova

2018

MATEC Web Conf.

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Abstract. Mathematical modeling of heat transfer processes proceeding together under conditions of intense phase transformations (melting and evaporation of metals) under laser action on a dimetallic target has been carried out. Based on the results of numerical simulation, it is established that the laser power exerts a significant influence on the dynamics of the melting process. It is shown that evaporation of metal in the boundary layer of the plate can also have a significant effect on the heat transfer characteristics. It is established that metal vapors forming a gas mixture in the near-wall region can absorb laser radiation and cause the phenomenon of optical resonance with increasing their critical concentration, in other words, when the metal melts, optical breakdown is possible.

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“…The system (1) - (2) The problem has been solved by the method of finite differences with using an implicit four-point difference template with the use of the discontinuous coefficients [9,10]. The nonstationary multidimensional Stefan problem has been solved by the method of implicit separation of the fusion front [11].…”

Section: Mathematical Formulation Of the Problemmentioning

confidence: 99%

Mathematical modeling of melting during laser heating of metal plate

2017

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Abstract. The mathematical modeling of heat transfer processes proceeding together under the conditions of intense phase transformations (melting and metal evaporation) under laser action on a metal plate has been carried out. The analysis of the results has showed that increasing of the laser radiation (q l ) power leads to acceleration of the melting process. However, it has been found that the change in the melting dynamics with variation of q l is characteristic only for the plates made of iron and copper. At the same time, it has been found that an increase in q l does not affect significantly the melting rate of the aluminum plates. It has been established that when the laser is exposed to a plate, zones with large temperature gradients are formed which can cause thermal stresses.

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Ignition of Wet Wood Particles in the Stream of High-Temperature Gases

Cited by 6 publications

References 25 publications

Mathematical modeling of the melting of ice under conditions of motion of a heat drill

Mathematical modeling of the melting of ice under conditions of motion of a heat drill

Mathematical modeling of heating of a dimetallic plate by a high-energy concentrated radiation flux

Mathematical modeling of melting during laser heating of metal plate

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