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This paper describes the numerical solution of time dependent, two coupled substances in one‐dimensional field that participate in a chemical reaction with two kinds of different concentrations that affect each other. It is necessary to find the final state solution of the component variability concentrations in numerical form. The equations are conjugated and dependent on the radius and time (the...
This paper presents a simulation‐based solution for calculating rocket engine performance with liquid‐type propellants of Paraffin and Kerosene for oxidizer to fuel ratio that is given by a linear formula. The engine was divided into two main stages: combustion chamber and a nozzle. In the first phase, conditions were found in the combustion chamber, based on the assumption of equilibrium according...
The following work describes the process of finding the flow and the temperature fields for a given ventilation system configuration. In order to simplify the problem, the flow was characterized as 2D, incompressible, viscous and in constant state. First, the governing equations in terms of the stream function, vorticity and Reynolds number have been developed. The obtained mathematical model for...
This paper describes the numerical solution of flow analysis in a two‐dimensional combustion chamber with two parallel inlets aided for propellants entrance, addressing a number of different problems that depend on each other: the flow affected by a discrete point in‐cell vortex, the velocity affected by the flow regime in the cell, and the combustion problem affected by the oxygen and fuel entries...
We consider the central problem of polarizable and leaky‐dielectric uncharged spherical particle freely suspended in an unbounded nonsymmetric binary electrolyte, which is forced by an ambient time‐harmonic uniform electric field. Under the assumption of a “weak field,” we employ the linearized standard electrokinetic model of binary electrolytes to account for such anion/cation asymmetry. A simplified...
The radial planar wedge pattern flow with friction and normalized non‐uniform viscosity function will be discussed here. Solving this problem will be done using the flow theory equations for Newtonian and Non‐Newtonian cases with non‐uniform viscosity assumption. General differential equation that connects between the normalized velocity profile and the normalized viscosity has been derived analytically...
This essay deals with the expansion of the classical problem, known as the impulsive start of motion over a cylindrical body. It was found that the boundary layer (BL) velocity profiles are similar to the classical results of Goldstein & Rosenhead. Moreover, high order (fourth approximation) of the velocity was developed and no effect on the BL velocity profile solution was found, confirming Watson...
A theoretical framework is provided for determining the self‐thermophoretic velocity of a light irradiated spheroidal Janus nanoparticle consisting of symmetric dielectric and perfectly conducting semi‐spheroids. The analysis is based on solving the linearized Joule heating problem due to uniform laser irradiance and on explicitly determining the temperature fields inside and outside the particle...
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