STM JOURNALS Scientific Technical Medical www.stmjournals.com Recent Trends in Fluid Mechanics (RTFM) Millifluidic Chips & Devices Lab on a Chip Solutions for Chemistry, Catalysis and Nanotechnologies Millifluidic Devices Applications Ÿ Single Channel Digital Millifluidic Device Ÿ Digital Millifluidic Device for Flow Focusing / Microdroplet Generation Ÿ Double Channel Digital Millifluidic Device Ÿ Multi-Channel Digital Millifluidic Device ü College & Research students can carry out Ø Controlled synthesis of chemicals & nanomaterials Ø Continuous flow catalysis Ø Understanding reaction mechanisms & kinetics ü High school students can learn about Ø Experimentally and computationally physics and chemistry of fluids in small volume Ø Lab on a chip device for STEM Learning Ÿ Use for combinatorial synthesis & field applications 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. 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 Properties & Use Millifluidic Chips Education & Research For Synthesis of nanomaterials & chemicals In situ time resolved analysis, catalysis and cell culture & analysis Polymeric Millifluidic Chips – Specialty Polymeric Millifluidic Chips – Generic Hydrodynamic & snake mixer Hydrophilic/Hydrophobic Property Use Chairman/Directors/Principal/ Researchers can contact for catalogue & more information at below mention details: Reinste Nano Ventures Pvt. Ltd Email: [email protected]www.reinste.com/millifluidics Tel No: 0120- 4781-216, 230, 212 M: 09810662669 Millifluidica STEM Science Technology Engineering Mathematics September - December 2014
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STM JOURNALSScientific Technical Medical
www.stmjournals.com
Recent Trends in Fluid Mechanics
(RTFM)
Millifluidic Chips & Devices
Lab on a Chip
Solutions for Chemistry, Catalysis and Nanotechnologies
Millifluidic Devices
Applications
Ÿ Single Channel Digital Millifluidic Device
Ÿ Digital Millifluidic Device for Flow
Focusing / Microdroplet Generation
Ÿ Double Channel Digital Millifluidic Device
Ÿ Multi-Channel Digital Millifluidic Device
ü College & Research students can carry out
Ø Controlled synthesis of chemicals & nanomaterials
Ø Continuous flow catalysis
Ø Understanding reaction mechanisms & kinetics
ü High school students can learn about
Ø Experimentally and computationally physics and chemistry of fluids in small volume
Ø Lab on a chip device for STEM Learning
Ÿ Use for combinatorial synthesis & field applications
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.
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
Properties & Use
Millifluidic Chips
Education & Research
For
Synthesis of nanomaterials & chemicals
In situ time resolved analysis, catalysis
and cell culture & analysis
Polymeric Millifluidic Chips – Specialty
Polymeric Millifluidic Chips – Generic
Hydrodynamic & snake mixer
Hydrophilic/Hydrophobic
Property
Use
Chairman/Directors/Principal/ Researchers can contact for catalogue & more information at below mention details:
1Department of Mechanical Engineering, RRCE, Bangalore, Karnataka, India
2Department of Computer Aided Engineering, VTU-Visvesvaraya Institute of Advanced Technology,
Muddenahalli Chickballapura 562101, India 3Professor & Head Mechanical Engineering, GEC Ramanagaram, Karnataka, India
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
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 water-
based drilling fluid system may be suitable for the drilling of sensitive shale formations.