Results 1 to 10 of about 18,579 (261)

A homogeneous relaxation low mach number model [PDF]

open access: yesESAIM: Mathematical Modelling and Numerical Analysis, 2021
In the present paper, we investigate a new homogeneous relaxation model describing the behaviour of a two-phase fluid flow in a low Mach number regime, which can be obtained as a low Mach number approximation of the well-known HRM. For this specific model, we derive an equation of state to describe the thermodynamics of the two-phase fluid.
Faccanoni, Gloria   +2 more
openaire   +1 more source

An Effective AUSM-Type Scheme for Both Cases of Low Mach Number and High Mach Number

open access: yesApplied Sciences, 2022
A new scheme called AUSMAS (Advection Upstream Splitting Method for All Speeds) is proposed for both high speed and low speed simulation cases. For the cases of low speed, it controls the checkerboard decoupling by keeping the coefficient of the pressure
Nan Li, Feng Qu, Di Sun, Guanghui Wu
doaj   +1 more source

Revisiting the Open-End Reflection Coefficient and Turbulent Losses in an Organ Pipe with Low Mach Number Flowipe with low Mach number flow

open access: yesArchives of Acoustics, 2021
The reflection coefficient of the open end belongs among the essential parameters in the physical description of a flue organ pipe. It leads directly to practical topics such as the pipe scaling.
Viktor HRUŠKA, Pavel DLASK
doaj   +1 more source

Scale-Resolving Simulations of a Circular Cylinder Subjected to Low Mach Number Turbulent Inflow

open access: yesJournal of Marine Science and Engineering, 2021
Inflow turbulence is relevant for many engineering applications relating to noise generation, including aircraft wings, landing gears, and non-cavitating marine propellers.
Artur K. Lidtke   +2 more
doaj   +1 more source

Aeroengine High-Attitude/Low Mach Number Oscillations: Mechanism and Prevention Design

open access: yesInternational Journal of Aerospace Engineering, 2021
The issue of aeroengine oscillations over high-attitude and low-speed flight envelope has been an unsolved problem due to their classified nature and hard reproduction in simulated altitude test stand.
Jiqiang Wang
doaj   +1 more source

A low Mach number solver: Enhancing applicability [PDF]

open access: yesJournal of Computational Physics, 2013
In astrophysics and meteorology there exist numerous situations where flows exhibit small velocities compared to the sound speed. To overcome the stringent timestep restrictions posed by the predominantly used explicit methods for integration in time the Euler (or Navier-Stokes) equations are usually replaced by modified versions.
Natalie Happenhofer   +4 more
openaire   +3 more sources

Numerical Modeling of Hydrogen Combustion: Approaches and Benchmarks

open access: yesFire, 2023
The paper is devoted to the analysis of two different approaches for the numerical simulation of gaseous combustion. The first one is based on a full system of Navier-Stokes equations describing the dynamics of the compressible reactive medium, while the
Ivan Yakovenko, Alexey Kiverin
doaj   +1 more source

Profile of a low-Mach-number shock in two-fluid plasma theory [PDF]

open access: yesAnnales Geophysicae, 2015
Magnetic profiles of low-Mach-number collisionless shocks in space plasmas are studied within the two-fluid plasma theory. Particular attention is given to the upstream magnetic oscillations generated at the ramp.
M. Gedalin, Y. Kushinsky, M. Balikhin
doaj   +1 more source

Theory Helps Observations: Determination of the Shock Mach Number and Scales From Magnetic Measurements

open access: yesFrontiers in Physics, 2022
The Mach number is one of the key parameters of collisionless shocks. Understanding shock physics requires knowledge of the spatial scales in the shock transition layer.
Michael Gedalin   +3 more
doaj   +1 more source

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