Millifluidic Chips & Devices
Science
STEM
Technology Engineering Mathematics
For
Recent Trends in Fluid Mechanics
Education & Research
Millifluidic Chips Polymeric Millifluidic Chips – Specialty Polymeric Millifluidic Chips – Generic
Property Hydrodynamic & snake mixer Hydrophilic/Hydrophobic
Use In situ time resolved analysis, catalysis and cell culture & analysis Synthesis of nanomaterials & chemicals
Lab on a Chip ü
Applications
(RTFM)
College & Research students can carry out
Ø Controlled synthesis of chemicals &
September - December 2014
nanomaterials
Millifluidic Devices
Ø Continuous flow catalysis
Ÿ Single Channel Digital Millifluidic Device
kinetics
Ÿ Digital Millifluidic Device for Flow
Focusing / Microdroplet Generation
Ø Understanding reaction mechanisms &
ü
High school students can learn about
Ø Experimentally and computationally physics
Ÿ Double Channel Digital Millifluidic Device
and chemistry of fluids in small volume
Ÿ Multi-Channel Digital Millifluidic Device
Ø Lab on a chip device for STEM Learning
Properties & Use Ÿ A hand-held device equipped with pumps,
a flow controller, a manifold and millifluidic chip Ÿ Simultaneously carry out four different operations on
four different channels Ÿ Capture video and images of the fluid dynamics within
the different channels Ÿ Flow rates from 0.2 to 3.0 ml/min Ÿ Use for combinatorial synthesis & field applications
Chairman/Directors/Principal/ Researchers can contact for catalogue & more information at below mention details: Reinste Nano Ventures Pvt. Ltd Email: info@reinste.com www.reinste.com/millifluidics Tel No: 0120- 4781-216, 230, 212 M: 09810662669
Ÿ Digitally operated and computer controlled flow control and setting Ÿ Suitable for a variety of water-based reactions Ÿ Ready-to-use in situ time resolved probe for reactions for applications in
chemistry, catalysis and nanotechnology Ÿ Millifluidica devices can be integrated with even a synchrotron beam lines or
any spectroscopy technique.
Solutions for Chemistry, Catalysis and Nanotechnologies
Millifluidica
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I take the privilege to present the print version for the Volume 1 Issue (3) of Recent Trends in Fluid Mechanics. The intension of RTFM is to create an atmosphere that stimulates creativeness, research and growth in the area of fluid mechanics and applications. The development and growth of the mankind is the consequence of brilliant Research done by eminent Scientists and Engineers in every field. RTFM provides an outlet for research findings and reviews in areas of fluid mechanics technology found to be relevant for national and international recent developments & research initiative. The aim and scope of the Journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high level learning, teaching and research in the domain of fluid mechanics research. Finally,I would like to thank Authors for their continued support and invaluable contributions and suggestions in the form of authoring. I express my sincere gratitude and thanks to our Editorial/ Reviewer board for write ups/ reviewing and providing constructive comments for the advancement of the journals. With regards to their due continuous support and co-operation, we have been able to publish quality Research/Reviews findings for our customers base. I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.
Dr. Archana Mehrotra Director STM Journals
Recent Trends in Fluid Mechanics
Contents
1. Fluid Flow and Solidification Analysis in Gravity Die Casting (GDC) Mahendra H.M., Ashwin C. Gowda, D.P. Girish
1
2. Development of Inhibitive Water-based Drilling Fluid System for Shale Formation Rajat Jain, Tinku Saikia, Vikas Mahto
12
Recent Trends in Fluid Mechanics Volume 1, Issue 3 www.stmjournals.com
Fluid Flow and Solidification Analysis in Gravity Die Casting (GDC) Mahendra H.M.1, Ashwin C. Gowda2*, D.P. Girish3 1
Department of Mechanical Engineering, RRCE, Bangalore, Karnataka, India Department of Computer Aided Engineering, VTU-Visvesvaraya Institute of Advanced Technology, Muddenahalli Chickballapura 562101, India 3 Professor & Head Mechanical Engineering, GEC Ramanagaram, Karnataka, India
2
Abstract Gravity die casting is a process wherein the fluid metal is poured into metallic moulds without application of any external force. The fluid metal enters the cavity by gravity method. In the design of dies for GDC, usage of “cores” is an important issue. The undercuts and the hollow shapes are produced with the help of additional mould parts called “cores”. For simple shapes without any under cuts the metallic cores could be used, whereas for undercuts and complex hollow shapes, which are difficult to retract, sand or plaster of Paris cores are employed. The gravity die casting process is required for huge volume production of non ferrous alloy castings of aluminum, magnesium, copper and zinc base alloys and to limited extent for cast iron castings. Castings can be produced by operation of dies manually or by automatic devices or through die casting machines based on the body of production. The die materials used are gray cast iron and steels. The GDC process is ensuring to achieving 20% higher mechanical properties than that of a sand casting because of quick rate of solidification imparting better grain size. The process can be automated and also can produce semi-gravity die-castings using sand or plaster of paris cores for production of interior details. In this study the Housing casting part produced were defective due to improper gating design, riser design, air entrapment, cold metal, etc. Using Advanced Simulation Software I have analyzed the problems existing and implemented such that defect free and quality castings are produced. The process is implemented to get good quality and defect free casting.
Keywords: die casting, GDC process, grain size, cores
RTFM (2014)© STM Journals 2014. All Rights Reserved
Recent Trends in Fluid Mechanics Volume 1, Issue 3 www.stmjournals.com
Development of Inhibitive Water-based Drilling Fluid System for Shale Formation Rajat Jain, Tinku Saikia, Vikas Mahto* Department of Petroleum Engineering, Indian School of Mines, Dhanbad, Jharkhand, India Abstract The drilling of troublesome shale formations leads to severe wellbore instability problems due to swelling and dispersion of the shale cuttings in the welllbore. Hence, the formulation of inhibitive water-based drilling fluid system with enhanced rheological properties and filtration characteristics is a critical issue for these complex shale formations. This research article consists of a favourable drilling fluid system developed using potassium chloride (KCL), partially hydrolyzed polyacrylamide (PHPA), ethylene glycol and xanthan gum polymer. The rheological properties and filtration characteristics were measured as per API recommended standard procedures for field testing of drilling fluids. The developed system has low plastic viscosity, good gel strength, high consistency index, and moderate apparent viscosity for the optimum performance of the drilling fluid system while dealing with shale formations. The developed drilling fluid formulations exhibited low fluid loss volume during the filtration studies. This system has high inhibition property which controls the hydration and dispersion of the shale cuttings inside the wellbore. Hence, developed inhibitive waterbased drilling fluid system may be suitable for the drilling of sensitive shale formations.
Keywords: drilling fluid, rheological properties, filtration characteristics, inhibition
RTFM (2014)Š STM Journals 2014. All Rights Reserved