Tata Consultancy Services Limited

Vivek Ganvir

Beena Rai

Auhin Kumar Maparu

Abhinandan Chiney

Pradip

Gautham Purushottham Basavarsu

Lele Ashish

Thaokar Rochish

- Pradip

According to an implementation of the present subject matter, a method for producing stable nanofluids is described. The method includes mixing of a base fluid with a dispersant and a metal oxide powder to form a primary mixture. The base fluid is a heat transfer fluid and the metal oxide powder includes particles of size greater than 100 nm. The method further includes grinding the primary mixture to obtain a concentrated nanoparticle suspension where the dispersant is added to the primary mixture during the grinding after every pre-determined time period.

Nanofluids for heat transfer applications

Present disclosure provides a process for the synthesis of doped titania nanoparticle having photocatalytic activity greater than 90% at 2 hours under sunlight irradiation. The process involves step a) milling a mixture containing anatase titania and a precursor compound, the compound selected from the group consisting of metal and non-metal salts, in the presence of water and oxide milling media, at a temperature in the range of 20 to 50&#xb0; C. for a period of 60-120 minutes, to form a slurry, wherein the amount of water is in the range of 15 to 25% by weight of the total mixture; and b) filtering the slurry to separate the oxide milling media and obtain a filtrate containing doped titania nanoparticles.

Process for synthesis of doped titania nanoparticles having photocatalytic activity in sunlight

A system and a method for analyzing and simulating a die swell and flow profile in polymer melt extrusion through a die. The system includes a mesh generator to generate a computational mesh; a pre-processor to obtain die parameters, boundary conditions, polymer melt parameters including rheological characterization and constitutive equations and to generate an input file; a simulator to receive the input file from the pre-processor and process the input data to simulate die swell; a mesh corrector means to analyze the die swell obtained from the simulator and to correct the motion of the computational mesh and polymer melt to converge the die swell; a post-processor to visualize the die swell and flow profiles for the polymer melt; and a database means to store the die swell corresponding to the die, mesh and polymer melt parameters.

Polymer melt extrusion which has potential use in die design

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Pune, India

Vivek Ganvir