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LinkedIn CFD Group Newsletter.

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  • 1. November 2008 Issue 7 L INKED I N CFD A networking forum for CFD professionals Inside This IssueNewsletter Issues Newsletter Issues Becoming More Practical 2 1   Share Your Thoughts 2Your  Opinion:  My  request  for  group’s  opinion  on  continuing   Improving solar panel 3the  monthly  newsletter  went  out  to  650  members  and  I  heard  back  from  35  members  (little  more  than  5%).  Interestingly,  only  two  members  did  not  see  any  value  for  the  newsletter.  That  is,  the  majority  of  respondents  requested   interesting  comment  from John  Chawner  of  Pointwise.  He  that  newsletter  to  be  continued  in  some  shape  or  form.   wrote:  It  would  be  interesting  to  know  how  you  see  the  Unfortunately,  this  might  be  the  last  newsletter  and    I  might   group  differentiating  itself  form  other  CFD  forums  such  as  have  to  disappoint  these  folks.  Honestly,  emailing  the   CFD-­‐Online.com  and  CFDReview.com.  My  thought  is  that  the  newsletter  or  the  link  to  a  newsletter  is  a  chore.  Currently,  I   best  way  this  group  can  help  our  members  is  to  provide  a  use  Gmail  to  email  the  entire  group  and  Gmail  does  not  allow   forum  for  networking  and  this  networking  could  certainly  mass  email  to  more  than  500  addresses  at  one  time,  with  or   include  technical  as  well  as  professional.  What  distinguishes  without  attachment.  Also,  they  limit  the  number  of  mass   this  group  from  the  other  forums  is  that  you  can  reach  the  emails  sent  per  day.  We  currently  have  706  members  and  we   entire  group  of  CFD  professionals  all  at  once  as  well  as  reach  are  still  growing.  Another  problem  is  our  membership  is   for  them  individually.  What  I  hope  we  can  develop  is  a  constantly  changing.  Therefore,  I  have  to  continue  making   database  that  we  can  easily  search  to  find  the  person  or  skill  changes  to  the distribution  list  by  exporting  from  LinkedIn   we  are  looking  for  that  already  resides  in  our  group.  The  and  importing  to  Gmail.  Finally,  I  am  getting  requests  from   expertise  is  there  and  the  information  is  there  as  well.  We  some  members  to  be  taken  of  the  Newsletter  email   just  need  to  put  it  together.  I  believe  soon  we  can  distribution.   accomplish  that.  LinkedIn  is  constantly  evolving  and  more     tools  are  being  provided  to  groups.  My  aim  is  to  use  all  the  Discontinuation  of  Newsletter:  I  believe  majority  of  our   available  tools  and  keep  you  updated.members  would  like  to  see  an  active  group  and  I  don’t  believe  that  necessarily  means  through  newsletter.  I  started  the  newsletter  because  in  the  past  there  were  no  means  to  communicate  with  the  entire  group.  Now  LinkedIn  allows  group  members  to  post  a  discussion  or  an  article  for  the  entire  group  to  see.  Therefore,  members  can  bypass  the  newsletter  or  me  and make  an  announcement  to  entire  group  on  their  own.  Members  will  however  need  to  set  your  email  notification  appropriately  if  they  want  to  know  about   Joining Usthese  postings.  To  do  that:  On  LinkedIn,  go  to  group  page;  click  on  tab  "setting,”  and  then  in  "contact  settings"  section,  check  Digest  Email.     Please  encourage  your  CFD  friends  or  colleagues  to  join  our  Improving  the  Group:  The  response  on  my  questions   LinkedIn  CFD  group.  Please  note  that  LinkedIn  membership  regarding  the  networking  benefits  and  suggestion  on   is  required  for  joining.  To  join,  applicants  should  first  sign  in  improving  the  group  were  fairly  sparse.  Several  respondents   on  LinkedIn  and  then  do  a  search  in  LinkedIn  using  stated  that  they  have  made  some  connections  in  the  group,   Keywords:  CFD  in  Category:  Professional  Group.  Our  group  but  no  drastic  networking  benefit  was  reported  yet.  I  hope   should  be  the  first  on  the  list.  Look  for  our  logo.  this  changes  as  we  learn  to  use  this  great  tool.    Among  the  responses  on  how  to  improve  the  group,  I  got  an      
  • 2. Becoming More Practical  At  University  of  Cincinnati  the  Theoretical  Becomes  Practical  -­‐  The  University  of  Cincinnati  has  participated  in  the  Pointwise  Teaching  Partnership  for  several  years  and  uses  Gridgen  in  many  of  its  graduate  and  undergraduate  courses  in  the  Department  of  Aerospace  Engineering  and  the  Department  of  Mechanical,  Industrial,  and  Nuclear  Engineering.  The  University  of  Cincinnati,  College  of  Engineering  is  known  for  originating  the  concept  of  cooperative  education  wherein  students  get  practical   Gridgen’s  floating  boundary  conditions  are  used  to  quickly  industrial  experience  while  completing  their  studies.  Even  in   improve  grid  quality  on  multiple  block  structured  grids.  the  classroom,  students  receive  hands-­‐on  experience  with    the  engineering  tools,  like  Gridgen,  they  will  use  after  they  graduate  and  begin  their  professional  careers.  Professor  Paul  Orkwis  coordinates  Gridgen’s  usage  at  the  University  of  Cincinnati.  He  notes,  “Gridgen  provides  an  effective  means  of  tying  together  theory  and  practice  of  mesh  construction  in  a  single  package  for  students  to  explore  both  structured,  unstructured,  and  hybrid  mesh  generation.”    In  his  numerical  grid  generation  course,  Professor  Orkwis’      students  quickly  become  proficient  using  Gridgen  as  he   Structured  and  unstructured  grids  are  combined  to  resolve  notes,  “After  only  a  single  lecture,  students  had  learned  the   both  the  boundary  layer  and  vortical  flow  structures  around  basics  and  were  able  to  generate  structured,  unstructured,   this  air  vehicle.  and  hybrid  meshes  on  simple  geometries.  Before  long,  students  were  generating  meshes  pertaining  to  their  own  interest  and  research  topics.”  Gridgen  has  been  used  for  a  variety  of  student  research  projects  from  the  study  of  blood  flow  in  arterial  grafts  to  turbine  blades  and  advanced  aircraft  projects.  A  good  example  of  the  types  of  structured  grids  being  generated  by  University  of  Cincinnati  students  is  the  mesh   Share Your Thoughtsfor  a  turbine  blade  generated  by  graduate  student  Marshall  Galbraith  shown  in  the  figure  below.  Floating  boundary  conditions  in  Gridgen’s  elliptic  partial  differential  equation  based  smoothing  techniques  were  used  to  improve  grid   You  now  have  the  tool  to  share  your  ideas,  requests,  opinions,  quality  by  allowing  domain  boundaries  to  move.   announcements,  and  news  to  the  entire  LinkedIn  CFD  group.  Students  have  also  used  Gridgen  for  hybrid  grids.  The  figure   You  can  either  post  a  discussion  or  an  article.  You  can  submit  a  below  shows  a  hybrid  grid  comprising  hexahedral,  pyramidal   discussion  topic  or  a  news  article  at  “overview”  page  of  our  and  tetrahedral  cells  for  an  Uninhabited  Air  Vehicle  study.  In   group.  To  get  notified  of  these  posting:  this  case,  the  grid  needs  to  resolve  the  surface  boundary   On  LinkedIn,  go  to  group  page;  click  on  tab  "setting,”  and  then  layer,  but  must  also  resolve  a  strong  vortex  that  comes  off   in  "contact  settings"  section,  check  Digest  Email.  the  wing-­‐body  junction.  The  geometry  is  such  that  it  makes    the  most  sense  to  have  unstructured  grids  away  from  the    surface  but  a  structured  grid  wrapped  around  the  surface    itself  to  resolve  the  boundary  layer.  This  was  accomplished  in  Gridgen  without  significant  difficulty.  Using  Gridgen  in  the  classroom  and  in  research  projects  gives  students  experience  with  the  types  of  analysis  tools  they  will  be  using  once  they  are  in  industry.  At  the  University  of  Cincinnati  it  is  just  a  continuation  of  their  tradition  of  providing  the  highest  level  of  both  theoretical  and  practical  education.      
  • 3. Improving PhotovoltaicSolar Panel PerformanceSchueco,  one  of  the  leading  producers  of  photovoltaic  panels,    “Examining  the  flow  of  air  under  the  photovoltaic  panels  used  Flomerics’  FloVENT  computational  fluid  dynamics  (CFD)   showed  that  the  size  of  the  passageway  was  constricting  software  to  redesign  its  products  to  improve  their  thermal   the  flow  of  air.  We  increased  the  depth  of  the  profile  that  performance  so  that  15%  to  20%  more  panels  can  be  used  in  a   supports  the  photovoltaic  panels  to  increase  the  distance  given  space.  Today’s  photovoltaic  panels  present  a  major   between  the  panels  and  the  roof.  Re-­‐running  the  thermal  design  challenge  since  every  degree  Centigrade  of   simulation  demonstrated  that  this  increased  the  airflow  temperature  rise  reduces  the  power  produced  by  0.5%.  “The   and  reduced  the  temperature  of  the  photovoltaic  panels.  CFD  results  helped  us  understand  exactly  how  the  panels  were   Through  these  studies,  we  optimized  the  design  of  the  solar  being  heated  and  guided  us  as  we  made  major  improvements   energy  systems  and  also  gained  an  understanding  of  how  to  the  design,”  said  Hamid  Batoul,  Technical  Director  of  Solar   temperature  is  affected  by  different  arrangements  of  Department,  Schueco  International,  Paris,  France.  “As  the  first   panels  and  ambient  conditions.”  in  our  industry  to  perform  CFD  simulation,  we  believe  that  we    are  now  able  to  provide  our  customers  with  substantially  higher  power  output  than  an  equivalent  competitive  design.”    Schueco  provides  complete  solar  energy  systems  including  all  components  needed  to  produce  energy  from  the  sun  including  panels,  collectors,  tanks,  mounting  system,  control  units  and  monitoring  electronics.  Sunlight  hits  the  photovoltaic  panels  and  generates  direct  current.  The  UK  government  sponsored  Energy  Saving  Trust  estimates  that  microgeneration  could  reduce  the  UK’s  carbon  emissions  by  15%  compared  with  the  present  mix  of  energy  generation.  The  Rocky  Mountain    Institute  in  Snowmass,  Colorado  recently  released  a  study  that    showed  that  output  of  small  scale  power  sources  will  soon    outstrip  the  world’s  nuclear  power  industry.   For  more  information  about  FloVENT,  visit     www.flovent.com.  Schueco  was  the  first  company  in  the  solar  energy  business  to      recognize  that  substantial  improvements  in  photovoltaic  panel  performance  could  be  achieved  by  optimizing  thermal  design.  “I  previously  worked  for  several  companies  making  telecommunications  equipment  and  used  thermal  simulation  to  solve  thermal  challenges,”  Batoul  said.  “I  found  that  Flomerics’  FloTHERM  CFD  software  was  the  most  powerful  tool  available  in  that  space.  Performing  thermal  simulation  of  solar  energy  systems  requires  different  software  because  of  the  need  to  model  building  materials  that  play  a  role  in  thermal  performance.  Flomerics  offers  FloVENT  CFD  software  designing  for  addressing  heating,  ventilation  and  cooling  problems  in  buildings.  We  tried  FloVENT  and  found  it  met  all  our  requirements  such  as  modeling  the  thermal  characteristics  of  glass  and  simulating  the  effects  of  radiation  on  the  panels.”    Batoul  uses  FloVENT  to  model  complete  solar  systems.  FloVENT  simulates  the  absorption  and  reflection  of  solar  energy  by  the  panels,  the  transfer  of  heat  to  aluminum  profiles  and  the  surrounding  air,  etc.  “The  CFD  results  helped  us  understand  exactly  how  the  panels  were  being  heated  and  guided  us  as  we  made  major  improvements  to  their  design,”  Batoul  said.          
  • 4. LinkedIn CFD cfdlinked@gmail.com Group Manager Kamran Fouladi fouladi@infomec.cc Phone: 610-291-6642 E-Mail: CFDlinked@gmail.comPast issuesPast  issues  of  this  newsletter  can  be  accessed  at:  http://www.infomec.cc/news.htm