16 documents found, page 1 of 2

Simulation of two-phase flow in network mixers using periodic boundary conditions

NETmix is a network mixer comprising mixing chambers interconnected by channels. Recently, a reduced geometry CFD model, the LoopNUB, was introduced for simulating single-phase flow with heat transfer in NETmix by imposing periodic conditions around the four unit cells of the network. This work proposes using LoopNUB, reducing the simulation domain by 2.3 compared to the geometry (ExtendedNUB) previously used t...

Metal-free carbon nitride polymeric films for the synthesis of valuable organic...

Immobilised photocatalytic systems can strongly contribute to attaining more sustainable chemical processes, reducing downstream units for photocatalyst recovery and purification of the target molecules. On the other hand, it is known that this kind of photocatalytic system usually presents higher mass transfer resistance when compared with slurries and, consequently, slower kinetics. Besides, this can be even ...

Closure plate for preloading a plate reactor, plate reactor and manufacturing m...

Network heat exchanger device, method and uses thereof

Continuous production of clathrate hydrates from aqueous and hydrate-forming st...

Supercritical CO2 assisted process for the production of high-purity and steril...

Hybrid scaffolds composed of hydroxyapatite (HAp), in particular in its nanometric form (n-HAp), and chitosan (CS) are promising materials for non-load-bearing bone graft applications. The main constraints of their production concern the successful implementation of the final purification/neutralization and sterilization steps. Often, the used purification strategies can compromise scaffold structural features,...

Intensification of heterogeneous TiO2 photocatalysis using an innovative micro-...

Numerical study of active mixing over a dynamic flow field in a T-jets mixer-In...

The flow field in a 2D T-jets mixer was simulated to study the effect of the pulsation/modulation of the jets flow rate on the dynamics of mixing. Different strategies, frequencies and amplitudes of the opposed jets flow rate modulation were tested. The modulation frequencies were set as multiples of the natural oscillation frequencies of the dynamics flow field. The natural flow frequencies are determined from...

Real time control of mixing in Reaction Injection Moulding

Reaction Injection Moulding, RIM, is a technology for the production of plastic parts using reactive in situ polymerization from the mixing of two or more liquid monomers. Although RIM is a widely used process, nowadays there are no means to effectively control mixing. This work assesses a new control variable of mixing in RIM: the differential static pressure between the liquid monomers injectors. This control...

An Elastic Analog Model for Controlling the Impingement Point Position in Confi...

Confined impinging jets (CIJs) are highly efficient mixers. The scales of mixing in CIJs are controlled by the opposed jets interaction. A mechanistic model is described here, which accurately predicts the impinging position of the opposed jets for a large range of flow rate ratios. The impinging point position is shown to impact the dynamic properties of the flow and the achieved mixing quality. The opposed je...