A newly developed heavy duty diesel engine in dual fuel mode of operation has been studied in detail. The main fuel would be natural gas and diesel oil as pilot injection. The importance and effects of mixture preparation and formation through ports, valves and in cylinder flow field with different swirl ratio and tumble on diesel combustion phenomena is an accepted feature which has been studi...

This work describes the application of hydrodynamic (ELCIRC) and transport (VELA and VELApart) models to the Ria Formosa lagoon (Portugal) to study the impact of the relocation of the Ancão Inlet. Located in the south of Portugal, this lagoon is a mesotidal barrier island system that communicates with the sea through 6 inlets. The Old Ancão Inlet was artificially closed and the New Ancão Inlet ...

During conceptual design of systems, the emphasis is on generating the system architecture: the configuration of sub-systems and the interactions between them. Ports, as locations of intended interaction, play an important role at this stage of design. They are convenient abstractions for representing the intended exchange of signals, energy or material; they can be applied at different levels ...

The present paper goal is to compile a comprehensive database of data on the pressure drop and flow distribution uniformity (FDU) utilizing CFD in network parallel tubes arranged Z configuration adopted for flat plate solar collectors. A 3D model implemented simulate such system as market, including two domains: tube materials fluid, besides entering exiting prolonged ports. specifications are ...

Tidal inlets are of great societal importance as they are often associated with ports and harbours, industry, tourism, recreation and prime waterfront real estate. Their behaviour is governed by the delicate balance of oceanic processes (tides, waves and mean sea level), and fluvial/estuarine processes (riverflow and heat fluxes), all of which can be significantly affected by climate change (CC...

We study the concept of ports and we define an ontology for representing them. Ports define the locations of interaction at the boundaries of components or sub-systems; they can be used across different disciplines for both product modeling and simulation. They are therefore a convenient abstraction that allows simulation modelers to modularize and encapsulate their system descriptions such tha...

In this paper, a moving horizon state and parameter estimation (MHE) scheme for the Varicol process is presented. The Varicol process is an extension of the Simulated Moving Bed (SMB) process that realizes non-integer column distributions over the separation zones by an asynchronous switching of the inlet and outlet ports (the ports are shifted individually). These additional degrees of freedom...

The multiobjecti®e optimization of continuous countercurrent chromatography sepa( ) ration units, such as simulated mo®ing bed SMB and Varicol, is considered. The Varicol system is based on a nonsynchronous shift of the inlet and outlet ports instead of the synchronous one used in the SMB technology. The optimization problem is complicated by the relati®e large number of decision ®ariables, inc...

A numerical study was carried out to investigate the thermal and flow fields of a two-dimensional vented cavity subjected forced convection turbulent flow. The with three distinct configurations inlet outlet ports having different cases top surfaces, i.e. flat, semi-elliptical semi-circular studied numerically for range Reynolds numbers. objective is effect curved wall surface on heat transfer ...

The system based on spatially resolved optical emission spectroscopy dedicated for in situ diagnostics of plasma assisted CVD processes is presented in this paper. Measurement system coupled with chemical vapour deposition chamber by dedicated fiber-optic paths enables investigation of spatial distribution of species densities (Hx, H , CH, CH) during chemical vapour deposition process. Experime...