Numerical and experimental study of orifice flow in the transitional regime

Alexeenko, Alina; Fliflet, Deborah Levin; Gimelshein, S. F.; Иванов, М. С.; Ketsdever, Andrew D.

doi:10.2514/6.2001-3072

Cited by 12 publications

(11 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sensitivity studies were performed with the DSMC to insure the solution was independent of grid spacing and number of simulated molecules. 12 Therefore the error in thrust calibrations is approximately ±10.6% at the lowest helium thrust level due primarily to errors in measuring the stagnation pressure, the orifice diameter, and assuming a transmission probability of unity. The experimentally derived stagnation pressures, temperatures, and orifice diameter were used in the DSMC and analytical calculations as known parameters.…”

Section: Error Analysismentioning

confidence: 99%

See 1 more Smart Citation

Gas Dynamic Calibration of a Nano-Newton Thrust Stand

Jamison¹,

Ketsdever²,

Muntz³

2002

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents-should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) REPORT TYPE Technical Papers DATES COVERED (From -To)

show abstract

Section: Error Analysismentioning

confidence: 99%

“…12 The DSMC simulations used experimentally determined stagnation pressures, temperatures, and mass flows as boundary conditions. Table 1 shows the DSMC and analytically derived thrust from Eq.…”

Section: Calibrationmentioning

confidence: 99%

Gas Dynamic Calibration of a Nano-Newton Thrust Stand

Jamison¹,

Ketsdever²,

Muntz³

2002

View full text Add to dashboard Cite

show abstract

“…Thus, the apparatus can be realized experimentally and used as a test for kinetic models, numerical methods and intermolecular interaction models. Furthermore, orifices and finite length channels are commonly encountered in many practical applications in aerospace [15], vacuum [127], microfluidics [128] and other applications [129,130,131], while long channels are also common in vacuum and MEMS networks.…”

Section: Flow Through Channelsmentioning

confidence: 99%

“…In order to obtain the behaviour of the flow for any rarefaction regime, the most successful approaches rely on the Direct Simulation Monte Carlo (DSMC) method and the discrete velocity method (DVM). For large pressure differences, DSMC has been used in the whole range of rarefaction, due to its simplicity and high accuracy for high speed flows, for the solution of slit [146,147,148], orifice [149,15,150] and short channel flow [151,152,147]. These works have limitations on the pressure ratio range, up to 0.7-0.9 [149,152] due to the increased noise in this regime.…”

Section: Flow Through Channelsmentioning

confidence: 99%

See 1 more Smart Citation

Simulation of transport phenomena in conditions far from thermodynamic equilibrium via kinetic theory with applications in vacuum technology and MEMS

Πανταζής¹

View full text Add to dashboard Cite

The approval of the current dissertation by the Department of Mechanical Engineering of the University of Thessaly does not imply acceptance of the author's opinions (Law 5343/32 number 202 paragraph 2). Also, the views and opinions expressed herein do not necessarily reflect those of the European Commission. There are several other people who I feel that have contributed in the writing of this dissertation.The most important contributions, along with several helpful conversations, were made by Prof. F.Sharipov, who provided the basic concept of the channel end effect study, and Dr. Chr. Day along with the KIT personnel, who briefly introduced me in the world of experimental rarefied gas dynamics. It was also a priviledge to discuss and work for a brief period of time with Prof. A. Grecos, who tirelessly discussed with me on various subjects of statistical mechanics. Financial support for this Ph.D. has been provided by the Euratom Association -Hellenic Republic, to which I am deeply indepted. Also, partial support for conference mobility expenses has been received from the GASMEMS Marie Curie programme. In this work, non-equilibrium transport phenomena have been examined via the kinetic theory of gases. The behaviour of the gas in low pressure conditions or in low-dimensionality systems can not be captured by the usual Navier-Stokes formulation, in conjunction with the constitutive laws of Newton-Fourier-Fick. The limited number of intermolecular collisions results in departure from equilibrium and the particulate nature of the gas must be taken into account, greatly increasing the computational effort.The problem is described by the integro-differential Boltzmann equation, which is used to determine the distribution of particles in physical and molecular velocity space, as well as in time.There are difficulties associated with the seven-dimensional nature of the distribution function, as well as with the complexity of the collision term, which is usually substituted by an appropriate model.The most widely used and successful numerical methodologies, the Discrete Velocity Method (DVM) and the Direct Simulation Monte Carlo (DSMC), are applied here in the whole range of the Knudsen number. It is important to employ approaches based on kinetic theory, since these are the only ones which are valid for any rarefaction level.In this work, several problems including non-equilibrium phenomena are considered. The interaction of gases with solid surfaces is considered for several problems according to the CercignaniLampis boundary conditions. The non-linear form of this scattering kernel, which had not been pre- viously used in the literature, is applied on the problem of heat transfer between parallel plates and coaxial cylinders. Its linearized form has also been employed for both flow and heat transfer problems and a comparison with relevant experiments has lead to surface characterization with respect to argon and helium flows.Non-linear heat conduction phenomena are also studied for the parallel plates and coaxial c...

show abstract

Rarefied gas flow through a cylindrical tube due to a small pressure difference

Pantazis

Valougeorgis

2013

European Journal of Mechanics - B/Fluids

View full text Add to dashboard Cite

Numerical and experimental study of orifice flow in the transitional regime

Cited by 12 publications

References 6 publications

Gas Dynamic Calibration of a Nano-Newton Thrust Stand

Gas Dynamic Calibration of a Nano-Newton Thrust Stand

Simulation of transport phenomena in conditions far from thermodynamic equilibrium via kinetic theory with applications in vacuum technology and MEMS

Rarefied gas flow through a cylindrical tube due to a small pressure difference

Contact Info

Product

Resources

About