Vol.2, No 3, 2001 pp. 149 - 157
UDC 537.565/.568
NUMERICAL INVESTIGATION OF LAMINAR NATURAL
CONVECTION IN INCLINED SQUARE ENCLOSURES
Miomir Raos
Faculty of Occupational Safety, University of Nis, Serbia, Yugoslavia
Abstract. The study represents investigation of the laminar natural
convection phenomena in enclosed spaces. Realization of this subject has
been done through number of phases, which have to make better understanding
and configuration velocity, temperature and pressure fields in enclosures.
The real physical model of the enclosure, which represents two - dimensional
rectangular object with differentially heated sides and adiabatic horisontal
walls, has been defined in order to predict good enough results. In fact,
this two - dimensional object could be represent base for three - dimensional
investigation, because all field are similar, for great object depth. Rotation
of the enclosures is one of parameter of this study too.
Physical model represents base for mathematical model which defines
valid parameters for temperature flow regime.
Solution of the defined mathematical model with respect the nature
of the equations, has been done with numerical control volume method. Due
to presence of the numerical procedure results there is made a computer
code, which contains SIMPLE procedure in essence, and which contains routines
for solving variables field.
Results of the numerical experiment has been compared with literature
ones, and it gives a reliable agreements. Results of this study with some
other analyses and research present good base for definition of the object
parameters which can find in engineering practice, and which essentially
contain natural convection phenomena.
NUMERIČKO ISTRAŽIVANJE LAMINARNE PRIRODNE
KONVEKCIJE U ZATVORENOM PROSTORU OBLIKA KVADRATA POD NAGIBOM
U ovom radu je prikazan pregled dela istraživanja u oblasti prenosa toplote
prirodno konvektivnih strujanja u zatvorenim prostorima, a odnosi se na
laminarnu prirodnu konvekciju. Istraživanje takvog fenomena izvršeno je
u više faza koje treba da bolje objasne strukturu polja temperatura, brzina
i pritisaka u prostoru. Fizički model prostora predstavljen je dvodimenzio-nalnim
paralelogramom sa različito zagrevanim bočnim zidovima i adijabatskim gornjim
i donjim zidom. Jedna od bitnih karakteristika numeričkog eksperimenta
je i rotacija prostora u odnosu na horizontalnu ravan. Takav fizički model
predstavljen je odgovarajućim matematičkim modelom, a njegovo rešavanje
izvrešeno je numeričkom procedurom i primenom originalnog softvera. Rezultati
istraživanja slažu se sa rezultatima iz literature i opravdavaju postavljene
predpostavke i metodologiju. Istraživanja mogu predstavljati dobru osnovu
za objašnjenje različitih fenomena koji u osnovi sadrže fenomen prirodne
konvekcije u prostorima.
