scholarly journals To the Computation of Equilibrium States of Hydrocarbon Combustion Products under the Lack of Oxygen

2019 ◽  
Vol 14 (4) ◽  
pp. 74-91
Author(s):  
E. S. Prokhorov
Keyword(s):  
Chemical Reaction ◽  
Combustion Products ◽  
Equilibrium States ◽  
Condensed Substance ◽  
Gas Mixture ◽  
Unified Approach ◽  
Large Molecules ◽  
Hydrocarbon Combustion ◽  
Condensed Carbon

In this paper, we propose a unified approach to the computation of equilibrium states of hydrocarbon combustion products under the lack of oxygen when both gaseous and condensed carbon phases can appear simultaneously among the components of chemical reaction. One of the principles forming the basis of the approach is that the particles of a condensed substance are “large molecules” consisting of a great number of normal molecules. To illustrate the feasibility of the formulated approach, the problem of explosion of reacting gas mixture in a volume has been numerically solved. The computations have been performed for oxy-acetylene and air-acetylene mixtures.

A simplified description of multicomponent diffusion in porous media. II. Conditions for negligible forced flow effects

1979 ◽  
Vol 44 (2) ◽  
pp. 465-474 ◽  
Author(s):  
Marta Černá ◽  
Jindřich Zahradník ◽  
Petr Schneider
Keyword(s):  
Porous Media ◽  
Pressure Gradient ◽  
Chemical Reaction ◽  
Multicomponent Diffusion ◽  
Forced Flow ◽  
Gas Mixture ◽  
Porous Catalyst ◽  
Diffusion In Porous Media ◽  
Flow Effects

Conditions are examined permitting the pressure gradient in a porous catalyst sustaining multicomponent diffusion of a gas mixture accompanied by chemical reaction to be neglected. Deviations are computed of the sum of mole fractions from unity for selected typical cases as a measure of error commited by neglecting the forced flow.

scholarly journals Peristaltic Blood Flow of Couple Stress Fluid Suspended with Nanoparticles under the Influence of Chemical Reaction and Activation Energy

Symmetry ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 276 ◽  
Author(s):  
Rahmat Ellahi ◽  
Ahmed Zeeshan ◽  
Farooq Hussain ◽  
A. Asadollahi
Keyword(s):  
Activation Energy ◽  
Chemical Reaction ◽  
Couple Stress ◽  
The Body ◽  
Couple Stress Fluid ◽  
Large Molecules ◽  
Arrhenius Function ◽  
Flexible Walls ◽  
Speed Up ◽  
Buongiorno Model

The present study gives a remedy for the malign tissues, cells, or clogged arteries of the heart by means of permeating a slim tube (i.e., catheter) in the body. The tiny size gold particles drift in free space of catheters having flexible walls with couple stress fluid. To improve the efficiency of curing and speed up the process, activation energy has been added to the process. The modified Arrhenius function and Buongiorno model, respectively, moderate the inclusion of activation energy and nanoparticles of gold. The effects of chemical reaction and activation energy on peristaltic transport of nanofluids are also taken into account. It is found that the golden particles encapsulate large molecules to transport essential drugs efficiently to the effected part of the organ.

scholarly journals A Theoretical Tool to Predict the Effects of Chemical Kinetics on Sound Propagation Within High Temperature Hydrocarbon Combustion Products

1999 ◽  
Author(s):  
Zakirul Haque ◽  
John P. Barton
Keyword(s):  
Absorption Coefficient ◽  
Sound Speed ◽  
Molecular Diffusion ◽  
Sound Propagation ◽  
Combustion Products ◽  
Viscous Stress ◽  
One Dimensional ◽  
Hydrocarbon Combustion ◽  
Diffusion Effects ◽  
Chemically Reacting

This paper involves a theoretical analysis of the propagation of sound within chemically reacting hydrocarbon combustion products. A new procedure for determining the sound speed and absorption coefficient was developed. Using a similar approach can do analyses for other chemically reacting gas mixture. One-dimensional sound propagation was assumed. Molecular diffusion effects, such as viscous stress, heat conduction, and mass diffusion were appropriately neglected along with possible effects due to vibrational non-equilibrium. In this way only the effects of chemical reactions on sound propagation was considered. The expressions for sound speed and absorption coefficient were derived as a function of frequency.

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