Faculty of Process Engineering University of Salah Boubnider Constantine 3 Algeria;
Faculty of Process Engineering University of Salah Boubnider Constantine 3 Algeria;
Faculty of Process Engineering University of Salah Boubnider Constantine 3 Algeria;
Faculty of Sciences and Applied Sciences University of Larbi BenM''hidi Oum el Bouaghi Algeria;
Richardson; number; mixed; convection; square; cavity; finite; difference; method; bifurcation;