The numerical simulation of two-dimensional incompressible complex flows of viscoelastic fluids is presented. The context is one, relevant to the food industry, of mixing within a cylindrical vessel, where stirrers are located on the lid of the vessel. Here, the motion is considered as driven by the rotation of the outer vessel wall, with various stirrer locations. With a single stirrer, both a...

An eigenanalysis-based technique is presented for the study and design of large complicated closed cavities and particularly Reverberation Chambers, including conductor and dielectric material losses. Two different numerical approaches are exploited. First, a straightforward approach is adopted where the finite walls conductivity is incorporated into the Finite Element Method (FEM) formulation ...

this paper introduces a method to design a robust adaptive predictive control based on Fuzzy model. The plant to be used as predictive model is simulated by TakagiSugeno Fuzzy Model, and the optimization problem is solved by a Genetic Algorithms or Branch and Bound. The method to tune parameters of the model predictive controller based on Lyapunov stability theorem is presented in this paper to...

Abstract The non-renewable energy sources are depleting at higher manner because of greater demand. Alternative fuel is a replacement for diesel in compressed ignition engines its significant environmental benefits. use alternative leads to reduction Opacity, NO X , HC and CO emissions the increase consumption brake thermal efficiency on without any modification. addition nanoparticles increase...

THE IMPROVEMENT OF RAMIE FIBER PROPERTIES AS COMPOSITE MATERIALS USING ALKALIZATION TREATMENT: NaOH CONCENTRATION. Ramie fiber is a plant that has good quality and potential as constituent of composite materials. In this study, ramie surface modification was conducted through alkalization with various at 0%, 4%, 5%, 6%, 7%, 8%, 9% concentrations using magnetic stirrer speed 200 rpm 70οC for 5 h...

Experiments are performed to assess the feasibility of cooling high flux heat sources flush mounted on the inner wall of a cylindrical vessel by a dielectric liquid flowing at high velocity parallel to the vessel wall. Fluid motion is induced by rotating a stirrer having radial blades about the axis of the vessel. The study focusses on examining critical heat flux (CHF) enhancement attributed t...

Complex rotational flows of non-Newtonian fluids are simulated through finite element methods. The predictions have direct relevance to dough kneading, associated with the food industry. The context is taken as two-dimensional and one of stirring material within a cylindrical vessel. Three stirrer shapes are considered, placed in eccentric location with respect to the cylinder centre. The motio...

Poly (3-hydroxy butyrate) (PHB), cellulose nano crystal (CNC) and a plasticizer (TBC) are mixed together with PLLA with the aim to increase the elongation at break for use in the food packing sector. Spherical (CNC) and fibril nano crystal (CNF) were prepared by hydrolysis of microcrystalline cellulose (MCC) in distilled water, and then stirred using a magnetic stirrer for 15 days and ultrasoni...

Cylindrical specimen (20 mm x 5 mm, n = 5) consisting of commercially pure titanium ASTM/grade 2 (Ti2 – Dentaurum J.P. Winkelstroeter KGPforzheim, Germany) were casted in the Rematitan system (Rematitan, Dentaurum J.P. Winkerstroeter KG, Pforzheim, Germany) by Vaiazzi Dental Laboratory (São Paulo SP, Brazil). All specimens were cold mounted with epoxy resin and then received the standard metall...

Treatment and disposal are two main approaches for water cycle management in the oil gas industry. Freeze concentration has been identified as one of methods to separate from wastewater samples. The conventional method used solution movement progressive freezing technique is stirring by a stirrer. However, stirrer requires frequent maintenance it needs be cleaned longer cleaning time due comple...