On the effect of turbulence models on CFD simulations of a counter-current spray drying process

2019 ◽  
Vol 141 ◽  
pp. 592-607 ◽  
Author(s):  
Hasan Jubaer ◽  
Sepideh Afshar ◽  
Jie Xiao ◽  
Xiao Dong Chen ◽  
Cordelia Selomulya ◽  
...  
Keyword(s):  
Spray Drying ◽  
Turbulence Models ◽  
Drying Process ◽  
Cfd Simulations ◽  
Counter Current

scholarly journals CFD model-supported design of monodisperse co-current spray dryers

2018 ◽  
Author(s):  
Maciej Jaskulski ◽  
Thi Thu Hang Tran ◽  
Evangelos Tsotsas
Keyword(s):  
Spray Drying ◽  
Skim Milk ◽  
Temperature Profiles ◽  
Thermal Deactivation ◽  
Cfd Model ◽  
Drying Process ◽  
Particle Collisions ◽  
Air Velocity ◽  
Cfd Simulations ◽  
Initial Droplet

In this study the operation of spray drying chambers fitted by the multi-stream monodisperse atomizer was simulated by the previously developed CFD model of skim milk spray drying. A series of CFD simulations of skim milk monodisperse spray drying were performed. The influence of different nozzle positions, initial droplet diameters (180 μm and 167 μm) and the way of air introduction (vertical or swirling with 30° or 60° angle) on the drying process were checked. Parameters like drying air and particle residence time, wall deposition, inter-particle collisions, protein thermal deactivation, air velocity and temperature profiles were compared for each case. Keywords: CFD, spray drying, skim milk, monodisperse atomizers, optimization.

Performance enhancement of Savonius wind turbine by blade shape and twisted angle modifications

2021 ◽  
pp. 095765092098794
Author(s):  
Ahmed M Nagib Elmekawy ◽  
Hassan A Hassan Saeed ◽  
Sadek Z Kassab
Keyword(s):  
Wind Turbine ◽  
Performance Enhancement ◽  
Three Dimensional ◽  
Turbulence Models ◽  
Vertical Axis ◽  
Cfd Simulations ◽  
Sliding Mesh ◽  
Blade Shape ◽  
Rotor Shape ◽  
Twisting Angle

Three-dimensional CFD simulations are carried out to study the increase of power generated from Savonius vertical axis wind turbines by modifying the blade shape and blade angel of twist. Twisting angle of the classical blade are varied and several proposed novel blade shapes are introduced to enhance the performance of the wind turbine. CFD simulations have been performed using sliding mesh technique of ANSYS software. Four turbulence models; realizable k -[Formula: see text], standard k - [Formula: see text], SST transition and SST k -[Formula: see text] are utilized in the simulations. The blade twisting angle has been modified for the proposed dimensions and wind speed. The introduced novel blade increased the power generated compared to the classical shapes. The two proposed novel blades achieved better power coefficients. One of the proposed models achieved an increase of 31% and the other one achieved 32.2% when compared to the classical rotor shape. The optimum twist angel for the two proposed models achieved 5.66% and 5.69% when compared with zero angle of twist.

scholarly journals Optimization of inulin production process parameters using response surface methodology

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Wasim Akram ◽  
Navneet Garud
Keyword(s):  
Response Surface ◽  
Spray Drying ◽  
Product Yield ◽  
Drying Methods ◽  
Process Variables ◽  
Drying Process ◽  
Uniform Size ◽  
Drying Temperature ◽  
Yield Value ◽  
Internal Configuration

Abstract Background Chicory is one of the major source of inulin. In our study, Box–Behnken model/response surface analysis (RSM) was used for the optimization of spray drying process variables to get the maximum inulin yield from chicory (Cichorium intybus L.). For this investigation, the investigational plan utilized three process variables drying temperature (115–125 °C), creep speed (20–24 rpm), and pressure (0.02–0.04 MPa). Result The optimal variables established by applying the Box–Behnken model were as follows: drying temperature 119.20 °C, creep speed 21.64 rpm, and pressure 0.03 MPa. The obtained powdered inulin by spray drying was investigated for the yield value, identification, size, and surface morphology of the particle. The inulin obtained from the spray drying process consists of a fine molecule-sized white powder. Instead, the drying methods shows a significant effect on the morphology and internal configuration of the powdered inulin, as the inulin obtained from spray drying was of a widespread and uniform size and shape, with a rough surface on increase in temperature and smoother surface while increasing the creep speed. The findings indicate that the spray drying with optimum parameters resulted in maximum product yield. Conclusion The outcomes of the study concluded that the product yield through spray drying technique under optimized condition is optimal as compared to other drying technique. Hence, this technique may be applied at commercial scale for the production of inulin.

Quality by design approach in the optimization of the spray-drying process

2011 ◽  
Vol 17 (4) ◽  
pp. 389-397 ◽  
Author(s):  
Arnaud Baldinger ◽  
Lucas Clerdent ◽  
Jukka Rantanen ◽  
Mingshi Yang ◽  
Holger Grohganz
Keyword(s):  
Spray Drying ◽  
Quality By Design ◽  
Design Approach ◽  
Drying Process ◽  
Quality By Design Approach

Effect of foam spray drying process parameters on powder morphology

2018 ◽  
Vol 37 (5) ◽  
pp. 535-545 ◽  
Author(s):  
Artur Lewandowski ◽  
Maciej Jaskulski ◽  
Ireneusz Zbiciński
Keyword(s):  
Spray Drying ◽  
Process Parameters ◽  
Drying Process ◽  
Powder Morphology

Optimization of a dry powder inhaler of ciprofloxacin-loaded polymeric nanomicelles by spray drying process

2019 ◽  
Vol 24 (5) ◽  
pp. 584-592 ◽  
Author(s):  
Mahdieh Farhangi ◽  
Arash Mahboubi ◽  
Farzad Kobarfard ◽  
Alireza Vatanara ◽  
Seyed Alireza Mortazavi
Keyword(s):  
Spray Drying ◽  
Dry Powder Inhaler ◽  
Drying Process ◽  
Dry Powder
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