with ever increas global energi demand diminish petroleum reserv current advanc drill technolog have result numer direct well be drill oper strive offset everris oper cost much deviatedwel drill allow driller exploit reservoir potenti penetr pay zone horizont rather than vertic fashion also present condit under which weight agent can settl out suspens the present work categor two part first part govern equat were built insid twodimension horizont pipe geometri finit element method util solv equationset second part govern equat were built insid threedimension horizont annular geometri finit volum method util solv equationset the result first part simul solid concentr mixtur viscos predict barit bed characterist for second part simul result show highest occurr barit sag low annular veloc nonrot drill pipe eccentr drill pipe the cfd approach studi can util research studi tool understand manag barit sag problem

Patrick Kabanda

Mingbo Wang

Numerical Simulation of Barite Sag in Pipe and Annular Flow

the threedimension model develop accord number 4 main trough blast furnac china steel csc bf4 the equat volum fluid vof were use describ turbul flow imping zone trough indic fluid liquid iron molten slag air govern equat respect paper the pressur field veloc profil were obtain finit volum method fvm pressur implicit split oper piso respect follow calcul wall shear stress through newton law viscos valid then oper condit main trough geometri were numer examin separ effici iron from slag stream shown result molten iron loss associ slag can reduc increas height differ between slag iron port reduc tap rate increas height open under skimmer

Li Wang

Chien-Nan Pan

Wen-Tung Cheng

Numerical Analysis on Flow Behavior of Molten Iron and Slag in Main Trough of Blast Furnace during Tapping Process

general iter process propos from which class parallel newtontyp iter method can deriv unifi converg theorem general iter process establish the converg newtontyp iter method obtain from unifi converg theorem the result effici analys numer exampl satisfactori

Qinglong Huang

The Convergence of a Class of Parallel Newton-Type Iterative Methods

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Advances in Numerical Analysis