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نمایش تعداد 1-10 از 174

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    Aircraft Propulsion 

    نوع: Journal Paper
    نویسنده : احسان روحی گل خطمی; Ehsan Roohi
    سال: 2015
    خلاصه:

    THE literature in the field of propulsion is rich with several outstanding books, including the first edition of

    this text. The unique feature of this second edition is that it covers updated materials: namely, ...

    Evaluation of the SBT collision model for near-continuum nano fourier flows 

    نوع: Conference Paper
    نویسنده : احسان روحی گل خطمی; Ehsan Roohi
    سال: 2016
    خلاصه:

    This paper provides a convergence study of the Simplified Bernoulli Trials (SBT) collision algorithm implemented in the direct simulation Monte Carlo (DSMC) method on the simulation of the one dimensional Fourier flow ...

    مدل سازی جت و محرک گردابه به منظور کنترل فعال جدایش جریان 

    نوع: Conference Paper
    نویسنده : حسین, هنرور پرسنایی; محسن, کهرم; احسان, روحی گل خطمی
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    Numerical study of flow patterns and heat transfer in mini twisted oval tubes 

    نوع: Journal Paper
    نویسنده : امین ابراهیمی; احسان روحی گل خطمی; Amin Ebrahimi; Ehsan Roohi
    سال: 2015
    خلاصه:

    Flow patterns and heat transfer inside mini twisted oval tubes (TOTs) heated by constanttemperature

    walls are numerically investigated. Di®erent con¯gurations of tubes are simulated

    using water as the working ...

    A new form of the second order temperature jump boundary condition for the low-speed nanoscale and hypersonic rarefied gas flow simulations 

    نوع: Journal Paper
    نویسنده : Nam T. P. Le; احسان روحی گل خطمی; Ehsan Roohi
    سال: 2015
    خلاصه:

    The accuracy of the numerical simulation of rarefied gas flows, in particular the Navier-Stokes-Fourier (N-S-F) equations, depends on the employed surface boundary conditions. In the literature, the combination of the ...

    A Novel Algorithm for Implementing Specified Wall Hat Flux in DSMC: Application to Micro/Nano Flows and Hypersonic Flows 

    نوع: Journal Paper
    نویسنده : حسن اخلاقی; احسان روحی گل خطمی; Ehsan Roohi
    سال: 2015
    خلاصه:

    This paper introduces a modified version of the iterative technique (IT) technique called the modified iterative technique (MIT) which implements a desirable wall heat flux distribution over the wall for rarefied gas ...

    Flow and thermal fields investigation in divergent micro/nano channels 

    نوع: Journal Paper
    نویسنده : امین ابراهیمی; احسان روحی گل خطمی; Amin Ebrahimi; Ehsan Roohi
    سال: 2016
    خلاصه:

    The present work is related to the study of the nitrogen gas flow

    through diverging micro/nano-channels. The direct simulation

    Monte-Carlo (DSMC) method has been used to study the flow.

    The Simplified ...

    Recommendations on performance of parallel DSMC algorithm in solving subsonic nanoflows 

    نوع: Journal Paper
    نویسنده : احسان روحی گل خطمی; Masoud Darbandi; Ehsan Roohi
    سال: 2012
    خلاصه:

    We investigate the efficiency of a parallel direct simulation Monte Carlo (PDSMC) algorithm

    in solving the rarefied subsonic flow through a nanochannel. We use MPI library

    to transfer data between the processors. ...

    DSMC simulation of subsonic flow through nanochannels and micro/nano backward-facing steps 

    نوع: Journal Paper
    نویسنده : Masoud Darbandi; احسان روحی گل خطمی; Ehsan Roohi
    سال: 2011
    خلاصه:

    In this study, we use direct simulation Monte Carlo method to simulate subsonic flow in nanochannels and

    micro/nanoscale backward-facing (BF) step considering a wide range of Knudsen number regimes. The

    nanochannel ...

    DSMC Investigation of Rarefied Gas Flow through Diverging Micro/Nano-channels 

    نوع: Journal Paper
    نویسنده : احسان روحی گل خطمی; امین ابراهیمی; Ehsan Roohi; Amin Ebrahimi
    سال: 2017
    خلاصه:

    Direct simulation Monte Carlo (DSMC) method with simplified Bernoulli-trials (SBT) collision

    scheme has been used to study the rarefied pressure-driven nitrogen flow through diverging

    microchannels. The fluid ...

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