Numerical study of shock propagation and attenuation in narrow tubes including friction and heat losses

Ngomo, Davy; Chaudhuri, A.; Chinnayya, A.; Hadjadj, A.

doi:10.1016/j.compfluid.2010.06.005

Cited by 38 publications

(15 citation statements)

References 26 publications

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“…In order to achieve an order of two, the Strang splitting is used instead of the previous Lie splitting. This achieves the coupling between the hydrodynamic solver and the source terms (see also [31,34]). …”

Section: Numerical Proceduresmentioning

confidence: 98%

“…When L s ¼ S, then the integration is that of the Euler forward method. An exponential integration can also be used as in [31]. For example, if the following time scale s ¼ ÀU=S is defined from the source term of the reactant and is hold constant during the time step, we get the exponential integration [35] and L s ¼ UðexpðÀDt=sÞ À 1Þ.…”

Section: Integration Of Source Termsmentioning

confidence: 99%

“…The outline of the WENO5-HLLC spatial discretization and the temporal third-order Runge-Kutta scheme are presented in [31]. We will present here the Strang's splitting resolution method and the computational grid.…”

Section: Numerical Proceduresmentioning

confidence: 99%

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Computational study of non-ideal and mildly-unstable detonation waves

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Section: Numerical Proceduresmentioning

confidence: 98%

Section: Integration Of Source Termsmentioning

confidence: 99%

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Computational study of non-ideal and mildly-unstable detonation waves

2015

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“…Good agreement was observed between simulations and theoretical results for the laminar portion of the boundary layer. Ngomo D. [6] studied the wall friction and heat transfer effects on the shock wave propagation in a micro shock tube. They found that diffusive shear stresses and energy losses near the wall significantly led to shock wave attenuation.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of flow characteristics in micro shock tubes

2015

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Recently micro shock tubes have been widely used in many engineering and industrial fields, but the characteristics of unsteady flow are not well known to date in micro shock tubes. Compared to conventional shock tubes with macro scales, flows related to shock waves in micro shock tubes are highly complicated. Stronger viscous and dissipative interactions make shock wave dynamic behaviors significantly different from theoretical predictions. In the present study, a CFD work was applied to the unsteady compressible Navier-Stokes equations which were solved using a fully implicit finite volume scheme. The diaphragm pressure ratio and shock tube diameter were varied to investigate their effects on micro shock tube flows. Different wall boundary conditions were also performed to observe shock wave and contact surface propagation with no slip and slip walls. Detailed flow characteristics at the foot of shock wave and contact surface propagation were known from the present numerical simulations.

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“…Sturtevant and Okamura (1969) and Kohsuke et al (2009) investigated the influence of the boundary layer on the shock wave propagation at different boundary conditions and good agreement was observed between simulations and theoretical results for the laminar region of the boundary layer. The wall friction and heat transfer effects on the shock wave propagation have been studied (Ngomo et al 2010) and it was found that diffusive shear stresses and energy losses near the wall significantly led to shock wave attenuation.…”

Section: Introductionmentioning

confidence: 99%

CFD Modelling of Flow Characteristics in Micro Shock Tubes

Mukhambetiyar

Jaeger

Adair

2017

JAFM

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The use of micro shock tubes has become common in many instruments requiring a high velocity and temperature flow field, for example in micro-propulsion systems and drug delivery devices for medical systems. A shock tube has closed ends, and the flow is generated by the rupture of a diaphragm separating a driver gas at high pressure from a driven gas at relatively low pressure. The rupture results in the movement of a shock wave and contact discontinuity into the low-pressure gas, and an expansion wave into the high pressure gas. The characteristics of the resulting unsteady flow for micro shock tubes are not well known as the physics of such tubes includes additional phenomena such as rarefaction and complex viscous effects at low Reynolds numbers. In the present study, computational fluid dynamics (CFD) calculations are made for unsteady compressible flow within a micro shock tube using the van-Leer MUSCL scheme and the two-layerturbulence model. Novel results have been obtained and discussed of the effects of using different diaphragm pressure ratios, shock tube diameters and wall boundary conditions, namely no slip and slip walls.

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Numerical study of shock propagation and attenuation in narrow tubes including friction and heat losses

Cited by 38 publications

References 26 publications

Computational study of non-ideal and mildly-unstable detonation waves

Computational study of non-ideal and mildly-unstable detonation waves

Numerical simulation of flow characteristics in micro shock tubes

CFD Modelling of Flow Characteristics in Micro Shock Tubes

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