The recent advancement computational technology has revolutionized the study of fluid flow. The use of computers to solve complex fluid mechanics equations is a strategy used by around a third of fluid mechanics researchers, with the proportion ever increasing. Continued technological advances offer ever-increasing computational power, which can be harnessed for viscous flow simulations to solve the Navier-Stokes equations. Computational Fluid Dynamics (CFD) methods are rapidly gaining popularity for naval architecture, ocean, marine, mechanical and chemical engineering applications. CFD may offer advantages over conducting experiments, or using the potential flow theory, in some aspects, provided that the Navier-Stokes equations can be solved accurately.

This special issue aims to invite researchers and engineers from both academia and industry to publish the latest progress of CFD applications in engineering, to discuss the current challenges faced in this area, and to explore future directions of research:

Two Phase Flow and Heat Transfer in Laminar and Turbulent Flow Regimes

CFD application in greenhouse environment and climate control

Recent advances in the application of computational fluid dynamics (CFD) in engineering problem.

The recent advancement computational technology has revolutionized the study of fluid flow. The use of computers to solve complex fluid mechanics equations is a strategy used by around a third of fluid mechanics researchers, with the proportion ever increasing. Continued technological advances offer ever-increasing computational power, which can be harnessed for viscous flow simulations to solve the Navier-Stokes equations. Computational Fluid Dynamics (CFD) methods are rapidly gaining popularity for naval architecture, ocean, marine, mechanical and chemical engineering applications. CFD may offer advantages over conducting experiments, or using the potential flow theory, in some aspects, provided that the Navier-Stokes equations can be solved accurately.

This special issue aims to invite researchers and engineers from both academia and industry to publish the latest progress of CFD applications in engineering, to discuss the current challenges faced in this area, and to explore future directions of research.

Ocean-Atmospheric circulation and dynamics occurs under the laws of fluid dynamics and is one of the main fields of fluid dynamics application and development. The main purpose of the proposed issue is understanding the phenomena and mechanism affection the general and detail hydrodynamics behavior of a real ocean basin in relation to the fluid dynamics laws.

Due to my academic and professional experience (about 12 years) on the Oman Sea basin in the north of the Indian Ocean and Regarding the fact that this area is one of the least studied oceanic basins in terms of ocean-atmosphere fluid dynamics and the resulted hydrodynamics patterns, I propose this basin as the main geographic region for the proposed issue. This is an area with a vast recent marine activities aiming to explore the fish and energy resources and access the mega-ports around the area. This proposes issue can be so appealing for researches from local countries like India, Iran, Oman, UAE, as well as many international researchers.

The increasing cost of electricity often drives the famers of the countries to adopt the natural ventilation in order to provide greenhouse aeration. Computational fluid dynamics is a tool that has been used in recent years to develop numerical models that improve our understanding of the interaction of variables that make up the climate inside greenhouses. In the past five years, more realistic studies have appeared due mainly to the development of more powerful software and hardware. However, it is necessary to perform an analysis to show us the trends, strengths and weaknesses in the use of this tool. Many studies have used CFD to investigate the climatic conditions inside greenhouses. CFD has been able to increase the degree of realism by taking into account insect-proof screens and simulation of the crop effect, among others in 3D models. The results have been able to improve the understanding of the phenomenon of greenhouse ventilation and climate distribution.

So, the main objective of the present issue is to group together a set of research work interesting by the experimental or simulation study of climate and environment control in agriculture.

The primary area of this event is to enhance research and developmental activities in Fluid mechanics, Fluid Engineering, Science and Technology & energy. Secondary objective is to interweave scientific information & Knowledge interchange between researchers, developers, engineers, students, and practitioners working in different areas. The session will give the opportunity to researchers, learners and students to utilize this terrific platform to share views and experiences in the areas of Mathematical Physics, and Fluid aspects in energy, electrical, civil, and mechanical Engineering.

Dispersion and deposition of particles have attracted attention of many researchers due to their wide applications in medical, environmental, and industrial fields including particle separation devices, solid particle formation, transport and deposition in combustors and post-combustion devices, indoor and outdoor environments and particle deposition in respiratory airways. Among different aspects of two-phase flows, due to the ever-increasing production of nano-particles and the potential for their adverse health effects, there has been specific interest in understanding the transport and deposition of nano-scale particulate matters specially in new emerging applications such as inhalation drug delivery devices, estimating personal exposure to particulate matters in indoor and outdoor environments and other bio-medical devices. Furthermore, in turbulent flows, the study of particle motion has received higher attention due to its difficulty in modeling and its importance in a number of industrial and engineering applications including pneumatic transport, powder generation equipment, gas turbine blades, oil-conveyance pipe lines, particle separation devices, combustion and post combustion systems, fluidized beds, spray systems and air pollution controls.

The aim of this special issue is to seek the original cutting-edge research results on two phase flow and heat transfer in laminar and turbulent flow regimes with particular emphasis on nano-particle, diesel engines, Lagrangian particle tracking, turbulent models and spray systems.

The special issue of the journal has been proposed with the aim to consolidate the work carried out on all the cutting edge technologies across the globe in the development of supersonic and hypersonic civil and military aircrafts. It will provide a common platform to all the researchers in academia and industry, to share their knowledge and challenges faced in design and development projects of these high speed vehicles. The experimental and computational studies carried out on aircrafts, space-crafts and missiles in these flow regimes are solicited.

Many of the processes in chemical process industry like absorption, desorption and scrubbing, gas-liquid reactions, aerobic fermentations, waste treatment etc involve the flow and contact of multiphase. Fine dispersion of one phase into another phase is desirable to promote intense mixing between immiscible phases, to increase interfacial area of contact and to create high turbulence in the continuous phase in order to achieve increase mass, momentum and energy transfer. An example of the above is gas-particle flow in a fluidized bed or the gas-liquid flow in a bubble column. According to Tatterson (1991), 25% of all chemical reactions occur between gas and liquid. A major class of gas-liquid flows is the one where the liquid phase is continuous and the gas phase is dispersed in the form of bubbles. The term bubbly flow is used to refer to as a flow of a gas or a mixture of gas in a continuous liquid as a dispersed phase of bubble. The bubbly flows unite the characteristics of deformable interfaces, channel shapes, flow direction and the compressibility of the gas phase. The bubbly flow behaviour are affected by the interfacial tension forces, the wetting characteristics of the liquid on the channel wall, contact angle and the exchange of mass, momentum, and energy between bubble and liquid. The bubble flow device, are widely used for carrying out reactions and mass transfer operations in which a gas or a mixture of gases is distributed in the form of dispersed phase of bubbles in a continuous liquid phase. In the liquid there can be suspended or fluidized, reactive or catalytic solids. Accordingly, the device is termed a two- or three-phase (slurry) bubble column. Bubble column reactors have been used in chemical, pharmaceutical, biochemical and other processes for many years. In this regard, However the studies regarding the hydrodynamics like flow regimes, holdup of phases, mixing characteristics, bubble size distribution and specific interfacial area are scanty. Therefore, a precise knowledge of the hydrodynamics in the inverse bubble flow would be of considerable interest.

Reactive and non-reactive fluid flows with heat and mass transfer are ubiquitous in oil and gas engineering. Along with the development of computer industry and the advancement of numerical methods, solid foundation in both hardware and software has been established to study petrochemical processes by using numerical simulation methods to improve current processes efficiency and develop new technologies. Equally, physical experimentation using more sophisticated techniques has intensified for the purpose to study new phenomena and validate the numerical models.

This special issue focuses on the latest advancements in physical and numerical experiments conducted to study phenomena related to the oil and gas industry. We invite investigators to contribute to this special issue with original research articles as well as review articles on computational and experimental methods for fluid flow and heat/mass transfer as well as their applications to solve oil and gas engineering problems.