Experimental quantification of the head loss coefficient K for fittings and semi-industrial pipe cross section solid concentration profile in pneumatic conveying of polypropylene pellets in dilute phase

Quantificação Experimental Do Coeficiente K Em Curva De 90° Em Unidade Semi-Industrial De Transporte Pneumático De Poliestireno

“…K = 4,97398 v (-0,538827) (2) Sendo K o fator multiplicador da carga cinética (adimensional) e v a velocidade do ar em m/s para vazões de poliestireno de 114,84 até 325,87 kg/h. Os valores de K obtidos com o polipropileno por Moraes et al (2017) foram, para as mesmas condições experimentais, inferiores ao do presente estudo com o poliestireno em função da geometria das partículas.…”

“…As vazões de poliestireno da presente pesquisa foram as mesmas fixadas por Moraes, et al (2017) para o polipropileno (esferas com diâmetro aproximado de 3 mm) ou seja: 114,84; 219,69 e 325,87 kg/h. Quantificou-se através de um anemômetro as velocidades no duto de sucção do ventilador.…”

Practical aspects in modeling the air conveying modes of small–piece food products

“…The use of empirical procedures [7,9,16] cannot provide a complete calculation of the installations, including changes in the characteristics of a two-component flow under different installation's modes of operation [17][18][19]. Using the most general theoretical description of the pneumatic conveying process mentioned in papers [1,8], objective difficulties associated with a complicated system of equations [4,5] in features of the control system with controlled feedback.…”

On the application of an Eulerian granular model towards dilute phase pneumatic conveying

“…The different formulation for different gas volume fraction as in equations (5)(6)(7)(8) follows the suggestion of Gidaspow [24]. The turbulent dispersion force , in equation 2is modelled with the FAD model [30] that is included in the software, according to equations (9-10)…”

“…Due to their complexities, experimental studies are still being conducted to study pneumatic conveying processes. Some examples will include work by Khan et al [5] on the pick-up velocity of particles and de Moraes et al [6] on head loss coefficient for pipe fittings, both of which deal with properties fundamental to pneumatic conveying processes. While experimental studies form a significant portion of pneumatic conveying investigations, the number of numerical simulation studies are increasing as well.…”