Bio & Biblio Howdy!   My   name   is Ali   Laleh,   and   I   have   more   than   20   years   of   experience   as   a   Process/Research Engineer,   involved   in   rectifying   industrial   scale   process   inefficiencies   and   optimizing   chemical plants.   My   background   has   been   formed   with   a   strong   orientation   toward   oil   production   and petrochemical   processes,   and   I   have   a   BSc   (2000),   a   MSc   (2003)   and   a   PhD   (2010)   all   in   the   field   of Chemical   Engineering.   I   started   Salva   Solution   in   2017   to   help   senior   students   and   professional Process    Engineers    dealing    with    the    critical    task    of    equipment    sizing/costing.    Acquired knowledge   and   experience   from   my   graduate   studies   career,   I   have   developed   and   published several    mobile    apps    which    are    working    accurately/swiftly    on    various    platforms.    Here,    for instance, I present a short story on how the multiphase separator sizing apps came to reality: The    classic    method    of    Svrcek-Monnery    was    there    for    decades    and    had    earned    fantastic popularity   and   international   reputation.   However,   Dr.   Svrcek   and   Dr.   Monnery   had   noticed   that some   tangible   improvements   would   be   offered   by   their   new   empirical   experiments   if   these observations   could   be   generalized   through   industrial   scale   empirical   data   and   CFD   simulations. At   this   stage,   I   got   a   great   chance   to   work   with   these   gentlemen   to   improve   the   original   design criteria   based   on   the   empirical   findings   and   realistic   CFD   simulations.   In   a   course   of   5   years,   the task   was   completed   successfully   and   I   gained   my   PhD   in   2010   under   their   supervision.   Later years,   we   published   1   academic   book   and   5   technical   papers   to   address   the   performed   research work and its significant results . A Lovely Gathering after Publication of the Book. From Left: Dr. Svrcek, Dr. Monnery, and Ali Laleh. It    is    worth    mentioning    that    a    complete    and    colourful    Kindle    version    of    my    thesis    can    be downloaded   from   here    at   a   cost   of   2-3   cups   of   coffee!   Anyways,   our   new   technology-oriented world   urge   more   availability   and   convenience!   So,   I   decided   to   share   the   very   ultimate/applied design    criteria    we    elucidated    from    our    extensive    investigations    with    you    guys,    motivated young/senior Process Engineers all around the world! After   several   years   of   hard   work,   my   developed   mobile   apps   have   found   a   way   to   the   global App Stores   of   Apple,   Android   and   etc.,   and   I   have   tried   to   provide   all   the   necessary   supportive information   here.   Anyways,   I   hope   you’ll   feel   free   to   contact   me   at   inquiry@salvasolution.com    if you have any unanswered questions. I’ll do my best to respond within a couple of days. Finally, you find the list of relevant literature associated with the CFD-based realistic approach developed for optimum design of the oilfield separators: Book Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “CFD Simulation of Oilfield Separators: A Realistic Approach”, LAMBERT Academic Publishing, 2011. Overview:    In   this   book,   a   realistic   simulation   approach   based   on   Computational   Fluid   Dynamics (CFD)   is   developed   to   provide   high-quality   visualization   of   the   multiphase   separation   process. Furthermore,   classic   separator   design   methodologies   are   evaluated   and   improved   design   criteria are   proposed.   A   useful   method   is   presented   for   estimation   of   the   droplet   sizes   used   to   calculate realistic   separation   velocities   for   various   oilfield   conditions.   The   velocity   constraints   associated with   re-entrainment   phenomenon   are   also   discussed   and   novel   correlations   are   provided.   This book,   also   demonstrates   the   benefits   that   CFD   analyses   provide   in   optimizing   the   design   of   new separators and solving problems with existing designs. Papers 1. Svrcek, W.Y., Monnery, W.D., “Design Two-Phase Separators within the Right Limits”, Chem. Eng. Progress, 89(10), 1993, 53-60. Overview:   This   internationally-acclaimed   paper   presents   an   algorithmic   method   for   sizing   the most    economical    two-phase    separator.    Different    approaches,    i.e.    GPSA,    York    Demister,    and Theoretical,   to   estimating   phase   separation   velocities   are   included.   The   design   procedure   is explained by worked examples. 2. Monnery, W.D., Svrcek, W.Y., “Successfully Specify Three-Phase Separators”, Chem. Eng. Progress, 90(9), 1994, 29-40. Overview:   This   internationally-acclaimed   paper   presents   an   algorithmic   method   for   sizing   the most   economical   three-phase   separator.   Different   approaches,   i.e.   GPSA,   York   Demister,   and Theoretical,   to   estimating   phase   separation   velocities   are   included.   The   design   procedure   is explained by worked examples. 3. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Computational Fluid Dynamics Simulation of Pilot-Plant-Scale Two-Phase Separators”, Chemical Engineering and Technology, 34(2), 2011, 296-306. Overview:    Two   computational   fluid   dynamics   (CFD)   modeling   approaches,   the   discrete   phase model    (DPM)    and    the    combination    of    volume    of    fluid    (VOF)    and    DPM,    are    developed    to simulate   the   phase   separation   phenomenon   in   four   pilot-plant   scale   separators.   The   incipient vapor   phase   velocity,   at   which   liquid   droplet   carryover   occurs,   and   separation   efficiency   plots are   used   as   criteria   for   evaluating   the   developed   CFD   models.   The   simulation   results   indicate that   the   VOF-DPM   approach   is   a   substantial   modification   to   the   DPM   approach   in   terms   of   the predicted   separation   efficiency   data   and   diagrams.   CFD   simulation   profiles   demonstrate   that   all the   separators   are   essentially   operating   at   a   constant   pressure.   The   CFD   results   also   show   that mist    eliminators    may    operate    more    efficiently    in    horizontal    separators    than    in    vertical separators. 4. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Design and CFD Studies of Multiphase Separators-A Review", The Canadian Journal of Chemical Engineering, 90(6), 2012, 1547-1560. Overview:    The   literature   on   the   multiphase   separators   abounds   with   macro   studies   and   design methodologies   for   two-   and   three-phase   vertical   and   horizontal   separators.   There   are   very   few studies   that   provide   the   micro   details   of   the   actual   separation   process.   This   paper   reviews   the important   relevant   literature   for   multiphase   separators   and   does   include   the   few   CFD-based studies    of    multiphase    separators.    However,    classic    guidelines    for    design    of    multiphase separators   and   two   academic   experimental   research   projects   have   also   been   reviewed.   In   the classic   methods,   vapour–liquid   and   liquid–liquid   separation   compartments   are   designed   based on   droplet   settling   theory.   Moreover,   the   retention   time   of   liquid   phase   is   selected   based   on empirical   data   or   heuristics   for   establishing   a   safe   and   smooth   operation   of   the   separator   and downstream   equipment.   In   fact,   the   popular   classic   methods   for   separator   design,   mostly   due   to a   lack   of   a   usable   mathematical   model   for   estimation   of   phase   separation   velocities,   do   result   in a   conservative   design   and   would   specify   extremely   oversized   separators.   In   order   to   reflect   the current   situation   and   address   recent   findings,   this   study   reviews   the   important   literature   on design   and   CFD   simulation   of   multiphase   separators.   This   review   shows   the   benefits   that   CFD analyses   can   provide   in   optimising   the   design   of   new   separators   and   solving   problems   with existing designs. 5. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Design Criteria for Oilfield Separators Improved by Computational Fluid Dynamics”, Chemical Engineering and Technology, 35(2), 2012, 323-333. Overview:    Oilfield   separator   data   ranging   from   light-oil   conditions   to   heavy-oil   conditions   were incorporated    into    suitable    two-phase    and    three-phase    computational    fluid    dynamics    (CFD) models   to   provide   improved   design   criteria   for   separator   design   methods.   The   CFD   simulation results   revealed   that   the   most   important   affecting   parameters   are   vapor   density   and   oil   viscosity. In   contrast   with   the   classic   design   methods,   noticeable   residence   times   were   required   for   liquid droplets   to   penetrate   through   the   fluid   interfaces.   Moreover,   it   was   indicated   that   the   Abraham equation   should   be   used   instead   of   the   Stokes’   law   in   the   liquid-liquid   separation   calculations. The   velocity   constraints   caused   by   re-entrainment   in   horizontal   separators   were   also   studied   and led to novel correlations. 6. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Computational Fluid Dynamics-Based Study of an Oilfield Separator-Part I: A Realistic Simulation", SPE-Oil and Gas Facilities, 1(6), 2012, 57-68. Overview:    A   realistic   CFD   simulation   of   a   field   three-phase   separator   has   been   developed.   This realistic   simulation   provides   an   understanding   of   both   microscopic   and   macroscopic   features   of the   three-phase   separation   phenomenon.   For   simulation   purposes,   an   efficient   combination   of two   multiphase   models   of   the   commercial   CFD   software,   ANSYS   Fluent,   was   implemented.   The flow-distributing   baffles   and   wire   mesh   demister   were   also   modeled   using   the   porous   media model.   Furthermore,   a   useful   approach   to   estimating   the   particle   size   distribution   in   oilfield separators    was    developed.    The    simulated    fluid-flow    profiles    are    realistic    and    the    predicted separation efficiencies are consistent with oilfield experience. 7. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Computational Fluid Dynamics-Based Study of an Oilfield Separator-Part II: An Optimum Design", SPE-Oil and Gas Facilities, 2(1), 2013, 52-59. Overview:     This    paper    provides    details    of    comprehensive    CFD-based    studies    performed    to overcome   the   separation   inefficiencies   experienced   in   a   large-scale   three-phase   separator.   It   is shown    that    the    classic    design    methods    are    too    conservative    and    would    result    in    oversized separators.   In   this   study,   effective   CFD   models   were   developed   to   estimate   the   phase-separation parameters    that    were    integrated    into    an    algorithmic    design    method    to    specify    a    realistic optimum   separator.   The   CFD   simulations   indicated   that   noticeable   residence   times   are   required for   liquid   droplets   to   penetrate   through   the   interfaces,   and   liquid   droplets   would   be   re-entrained from the liquid-liquid interface vicinity by the continuous liquid phase.
salvasolution.com  2019 by Ali P. Laleh                                    All rights reserved. Bio & Biblio
Bio & Biblio Howdy   Guys!   My   name   is   Ali   Laleh,   and   I   have   more   than 20    years    of    experience    as    a    Process/Research    Engineer, involved   in   rectifying   industrial   scale   process   inefficiencies and   optimizing   chemical   plants.   My   background   has   been formed   with   a   strong   orientation   toward   oil   production   and petrochemical    processes,    and    I    have    a    BSc    (2000),    a    MSc (2003)    and    a    PhD    (2010)    all    in    the    field    of    Chemical Engineering.   I   started   Salva   Solution   in   2017   to   help   senior students   and   professional   Process   Engineers   dealing   with the    critical    task    of    equipment    sizing/costing.    Acquired knowledge   and   experience   from   my   graduate   studies   career, I   have   developed   and   published   several   mobile   apps   which are   working   accurately/swiftly   on   various   platforms.   Here, for   instance,   I   present   a   short   story   on   how   the   multiphase separator sizing apps came to reality: The     classic     method     of     Svrcek-Monnery     was     there     for decades      and      had      earned      fantastic      popularity      and international    reputation.    However,    Dr.    Svrcek    and    Dr. Monnery    had    noticed    that    some    tangible    improvements would    be    offered    by    their    new    empirical    experiments    if these   observations   could   be   generalized   through   industrial scale   empirical   data   and   CFD   simulations.   At   this   stage,   I got   a   great   chance   to   work   with   these   gentlemen   to   improve the   original   design   criteria   based   on   the   empirical   findings and   realistic   CFD   simulations.   In   a   course   of   5   years,   the task   was   completed   successfully   and   I   gained   my   PhD   in 2010   under   their   supervision.   Later   years,   we   published   1 academic    book    and    5    technical    papers    to    address    the performed research work and its significant resul t s. A Lovely Gathering after Publication of the Book. From Left: Dr. Svrcek, Dr. Monnery, and Ali Laleh. It   is   worth   mentioning   that   a   complete   and   colourful   Kindle version   of   my   thesis   can   be   downloaded   from   here    at   a   cost of    2-3    cups    of    coffee!        Anyways,    our    new    technology- oriented   world   urge   more   availability   and   convenience!   So, I   decided   to   share   the   very   ultimate/applied   design   criteria we   elucidated   from   our   extensive   investigations   with   you guys,   motivated   young/senior   Process   Engineers   all   around the world! After   several   years   of   hard   work,   my   developed   mobile   apps have    found    a    way    to    the    global    App    Stores    of    Apple, Android    and    etc.,    and    I    have    tried    to    provide    all    the necessary    supportive    information    here.    Anyways,    I    hope you’ll   feel   free   to   contact   me   at   inquiry@salvasolution.com    if you    have    any    unanswered    questions.    I’ll    do    my    best    to respond within a couple of days. Finally, here is the list of relevant literature associated with the CFD-based realistic approach developed for optimum design of the oilfield separators: Book Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “CFD Simulation of Oilfield Separators: A Realistic Approach”, LAMBERT Academic Publishing, 2011. Overview:     In    this    book,    a    realistic    simulation    approach based      on      Computational      Fluid      Dynamics      (CFD)      is developed    to    provide    high-quality    visualization    of    the multiphase       separation       process.       Furthermore,       classic separator   design   methodologies   are   evaluated   and   improved design   criteria   are   proposed.   A   useful   method   is   presented for   estimation   of   the   droplet   sizes   used   to   calculate   realistic separation    velocities    for    various    oilfield    conditions.    The velocity       constraints       associated       with       re-entrainment phenomenon   are   also   discussed   and   novel   correlations   are provided.    This    book,    also    demonstrates    the    benefits    that CFD    analyses    provide    in    optimizing    the    design    of    new separators and solving problems with existing designs. Papers 1. Svrcek, W.Y., Monnery, W.D., “Design Two-Phase Separators within the Right Limits”, Chem. Eng. Progress, 89(10), 1993, 53-60. Overview:   This   internationally-acclaimed   paper   presents   an algorithmic    method    for    sizing    the    most    economical    two- phase    separator.    Different    approaches,    i.e.    GPSA,    York Demister,   and   Theoretical,   to   estimating   phase   separation velocities   are   included.   The   design   procedure   is   explained by worked examples. 2. Monnery, W.D., Svrcek, W.Y., “Successfully Specify Three-Phase Separators”, Chem. Eng. Progress, 90(9), 1994, 29-40. Overview:   This   internationally-acclaimed   paper   presents   an algorithmic   method   for   sizing   the   most   economical   three- phase    separator.    Different    approaches,    i.e.    GPSA,    York Demister,   and   Theoretical,   to   estimating   phase   separation velocities   are   included.   The   design   procedure   is   explained by worked examples. 3. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Computational Fluid Dynamics Simulation of Pilot-Plant- Scale Two-Phase Separators”, Chemical Engineering and Technology, 34(2), 2011, 296-306. Overview:      Two     computational     fluid     dynamics     (CFD) modeling   approaches,   the   discrete   phase   model   (DPM)   and the   combination   of   volume   of   fluid   (VOF)   and   DPM,   are developed   to   simulate   the   phase   separation   phenomenon   in four   pilot-plant   scale   separators.   The   incipient   vapor   phase velocity,    at    which    liquid    droplet    carryover    occurs,    and separation   efficiency   plots   are   used   as   criteria   for   evaluating the   developed   CFD   models.   The   simulation   results   indicate that   the   VOF-DPM   approach   is   a   substantial   modification   to the    DPM    approach    in    terms    of    the    predicted    separation efficiency    data    and    diagrams.    CFD    simulation    profiles demonstrate   that   all   the   separators   are   essentially   operating at   a   constant   pressure.   The   CFD   results   also   show   that   mist eliminators    may    operate    more    efficiently    in    horizontal separators than in vertical separators. 4. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Design and CFD Studies of Multiphase Separators-A Review", The Canadian Journal of Chemical Engineering, 90(6), 2012, 1547-1560. Overview:     The    literature    on    the    multiphase    separators abounds   with   macro   studies   and   design   methodologies   for two-    and    three-phase    vertical    and    horizontal    separators. There   are   very   few   studies   that   provide   the   micro   details   of the     actual     separation     process.     This     paper     reviews     the important   relevant   literature   for   multiphase   separators   and does    include    the    few    CFD-based    studies    of    multiphase separators.     However,     classic     guidelines     for     design     of multiphase     separators     and     two     academic     experimental research    projects    have    also    been    reviewed.    In    the    classic methods,      vapour–liquid      and      liquid–liquid      separation compartments     are     designed     based     on     droplet     settling theory.    Moreover,    the    retention    time    of    liquid    phase    is selected      based      on      empirical      data      or      heuristics      for establishing   a   safe   and   smooth   operation   of   the   separator and    downstream    equipment.    In    fact,    the    popular    classic methods    for    separator    design,    mostly    due    to    a    lack    of    a usable     mathematical     model     for     estimation     of     phase separation   velocities,   do   result   in   a   conservative   design   and would   specify   extremely   oversized   separators.   In   order   to reflect   the   current   situation   and   address   recent   findings,   this study   reviews   the   important   literature   on   design   and   CFD simulation   of   multiphase   separators.   This   review   shows   the benefits   that   CFD   analyses   can   provide   in   optimising   the design     of     new     separators     and     solving     problems     with existing designs. 5. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Design Criteria for Oilfield Separators Improved by Computational Fluid Dynamics”, Chemical Engineering and Technology, 35(2), 2012, 323-333. Overview:     Oilfield    separator    data    ranging    from    light-oil conditions   to   heavy-oil   conditions   were   incorporated   into suitable    two-phase    and    three-phase    computational    fluid dynamics   (CFD)   models   to   provide   improved   design   criteria for   separator   design   methods.   The   CFD   simulation   results revealed   that   the   most   important   affecting   parameters   are vapor   density   and   oil   viscosity.   In   contrast   with   the   classic design   methods,   noticeable   residence   times   were   required for   liquid   droplets   to   penetrate   through   the   fluid   interfaces. Moreover,    it    was    indicated    that    the    Abraham    equation should   be   used   instead   of   the   Stokes’   law   in   the   liquid- liquid     separation     calculations.     The     velocity     constraints caused   by   re-entrainment   in   horizontal   separators   were   also studied and led to novel correlations. 6. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Computational Fluid Dynamics-Based Study of an Oilfield Separator-Part I: A Realistic Simulation", SPE-Oil and Gas Facilities, 1(6), 2012, 57-68. Overview:    A   realistic   CFD   simulation   of   a   field   three-phase separator    has    been    developed.    This    realistic    simulation provides     an     understanding     of     both     microscopic     and macroscopic      features      of      the      three-phase      separation phenomenon.      For      simulation      purposes,      an      efficient combination   of   two   multiphase   models   of   the   commercial CFD   software,   ANSYS   Fluent,   was   implemented.   The   flow- distributing    baffles    and    wire    mesh    demister    were    also modeled    using    the    porous    media    model.    Furthermore,    a useful   approach   to   estimating   the   particle   size   distribution in   oilfield   separators   was   developed.   The   simulated   fluid- flow    profiles    are    realistic    and    the    predicted    separation efficiencies are consistent with oilfield experience. 7. Pourahmadi Laleh, A., Svrcek, W.Y., Monnery, W.D., “Computational Fluid Dynamics-Based Study of an Oilfield Separator-Part II: An Optimum Design", SPE-Oil and Gas Facilities, 2(1), 2013, 52-59. Overview:     This    paper    provides    details    of    comprehensive CFD-based   studies   performed   to   overcome   the   separation inefficiencies     experienced     in     a     large-scale     three-phase separator.   It   is   shown   that   the   classic   design   methods   are   too conservative   and   would   result   in   oversized   separators.   In this     study,     effective     CFD     models     were     developed     to estimate      the      phase-separation      parameters      that      were integrated   into   an   algorithmic   design   method   to   specify   a realistic   optimum   separator.   The   CFD   simulations   indicated that    noticeable    residence    times    are    required    for    liquid droplets    to    penetrate    through    the    interfaces,    and    liquid droplets    would    be    re-entrained    from    the    liquid-liquid interface vicinity by the continuous liquid phase.
salvasolution.com  2019 by Ali P. Laleh            All rights reserved.