Ramesh Chohan

creative

I have worked as research engineer and university researcher in a number of projects. Some of these are in the following areas.

• Embedded software and hardware.
• Fluid dynamics and heat transfer.
• Instrumentation and Control
• Mathematical modelling and simulation
• Polymer processing and composites
• Biomedical Engineering
• Mechanical engineering
• Digital Signal Processing.
• Pharmaceutical processing.

I have written numerous reports, documents and papers. Some are as follows - Please note that, quite a few were in an industry environment and their full titles have not been stated below; ONLY a few are listed here..

• Architectures for Dual mode GSM-3G handsets - industrial confidential document.
• Chohan, R. K., 1988, "Plastic Deformations Induced by Pressure Transients in Fluid-Filled Pipes", International Journal of Pressure Vessels Piping, Vol. 33, pp. 333-339.
• Response time correlation for industrial temperature sensors R K Chohan 1986 J. Phys. E: Sci. Instrum. 19 786-787 .
• Dynamic Memory Allocation in DSPs - industrial confidential document.
• Dynamic Memory Allocation in DSPs - industrial confidential document.
• Memory Fragmentation Measurement and use - industrial confidential document.
• Test code for memory fragmentation - industrial confidential document.
• Performance of a Sound recognition module - industrial confidential document.
• Integrating DSP algorithms using properirtary technology from... - industrial confidential document.
• Requirements for an XML parser for embedded systems - industrial confidential document.
• Safety and Fault detection in Processcontrol systems and sensors. R.K.Chohan and B.Upadhyaya. Fire and Safety Journal, vol 14, pp 167-177, 1989.
• Forced convection from liquids to industrial thermometers in cross-flow. R.K.Chohan, Heat Recovery systems & CHP. vol. 8, pp 363-370, 1988.
• Effects of manufacturing tolerances on the thermal response of industrial Thermometers. Proc Inst. of Mech Engs, vol 200, no. C4, pp 265-269, 1986.
• Response time correlation for industrial temperature sensors. R.K.Chohan. J. Phys E:Sci. Instrum. vol 19, 1986.
• Dynamic response of temperature sensors. T.W.Kerlin and R.K.Chohan. Handbook of Applications of Measuring Instruments-Electrical Instruments ed. R.L.Moore, Wiley 1985.
• Waves in Elastic Fluid-filled tubes. R.K.Chohan. Int J. Pres. Ves. & piping, vol 36, pp 187-197, 1989.
• Analysis of extrusion of some wet powder masses used in extrusion/spheronisation R. K. Chohan and J. M. Newton
• "Testing of Industrial Temperature Sensors in Liquids", R.K.Chohan, Int'l Journal of Energy Research, vol. 13, Nov. 6, Nov.-Dec. 1989, pp. 661-672
• On the Design of Internal Mixers R.K. Chohan,Journal of Elastomers and Plastics, Vol. 20, No. 4, 318-326 (1988) .
• Converging flow measurements for injection moulding, Proc. PPS 9, April 1993 Groves D, Chohan R K and Coates P D.
• Predicting the rheology of linear with branched polyethylene blends,Groves D, McLeish T, Chohan R K, Coates P, Rheol. Acta 35, 481-493, 1996.

I have developed mathematical and digital models; Some mathematical models have been published. Some years ago, I derived the following equation (published in a paper listed above). This gives the speed with which a wave moves in a pipe filled with a liqiud or gas.

This is the speed with a disturbance travels in a pipe or blood vessel when, for example, a valve is suddenly closed. The following animation should give an idea of a disturbance travelling in a pipe.

How a wave travels in a pipe or blood vessel: the wave deforms the pipe as it travels.

I have worked in engineering areas such as mechanical, materials, instrumentation, processing, systems mostly as a research engineer but have also worked as an engineer/consultant. Some projects include:

• Design of an experimental rig to test pressure transients.
• Validate temperature sensor behaviour in installations.
• Test pressure sensors.
• Create database for composite materials selection
• Polymer materials selection database revision and update.
• Design of rig for explosion damage in high pressure vessels.
• Design billing software and implementat for an embedded system.
• Enhance and maintain various features for ISDN software for embedded systems.
• Contribute to development for protocols software for ISDN converters in several embedded systems.

I have tought several courses; amongst them were:

• Biomedical Fluid Dynamics.
• Design of Biomedical Devices.
• Polymer processing.

I have carried extensive research in each of the areas mentioned on this page.