NATURAL CONVECTION HEAT TRANSFER IN A PARTIALLY DIVIDED TRAPEZOIDAL ENCLOSURE

Abstract

Nat u ral con vec tion heat trans fer in a par tially di vided trap e zoidal en clo sure is stud ied nu mer i cally us ing the con trol vol ume method. Sum mer and win ter con di - tions are sep a rately ex am ined by im pos ing re gard ing ther mal bound ary con di tions. A hor i zon tal di vider in cluded and its two dif fer ent place ments are con sid ered. It is shown that heat trans fer re sults are not sig nif i cantly al tered by the pres ence of the di vider for sum mer con di tion. For win ter con di tion, on the other hand, dec re ment in heat loss and ef fect on the flow and the tem per a ture fields by the pres ence and the place ment of the di vider are ob served, re spec tively. As a hor i zon tal di vider is placed to op pose buoy ancy, the flow strength be comes weaker and for ma tion of two sep a rate lev els of tem per a ture uni for mity oc curs. As the di vider is placed to as sist buoy ancy, the flow gets stron ger and tends to form rel a tively uni form tem per a ture field within whole en clo sure