Samir Khan

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Member for: 16 years, 289 days

Contact Samir Khan

My role is to help customers better exploit our tools. I’ve worked in selling, supporting and marketing maths and simulation software for all my professional career.

I’m fascinated by the full breadth and range of application of Maple. From financial mathematics and engineering to probability and calculus, I’m always impressed by what our users do with our tools.

However much I strenuously deny it, I’m a geek at heart. My first encounter with Maple was as an undergraduate when I used it to symbolically solve the differential equations that described the heat transfer in a series of stirred tanks. My colleagues brute-forced the problem with a numerical solution in Fortran (but they got the marks because that was the point of the course). I’ve since dramatized the process in a worksheet, and never fail to bore people with the story behind it.

I was born, raised and spent my formative years in England’s second city, Birmingham. I graduated with a degree in Chemical Engineering from The University of Nottingham, and after completing a PhD in Fluid Dynamics at Herriot-Watt University in Edinburgh, I started working for Adept Scientific – Maplesoft’s partner in the UK.

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These are Posts that have been published by Samir Khan

CoolProp: Thermophysical Properties for ...

Posted: Samir Khan 2066 Product: Maple

January 14 2014

8 3

CoolProp is an open source C++ library of thermophysical properties for pure fluids, pseudo-pure fluids, and humid air. Ian Bell has recently developed a wrapper for Maple (get the wrapper and library at Github). Compiling CoolProp gives a library (a DLL on Windows) you can call in Maple via define_external().

I started exploring CoolProp a few days ago, and here's a few simple examples of what you can do

The saturation pressure (in kPa) of the refrigerant R134a at 253 K

The pressure (in kPa) of the refrigerant R22 that produces a two-phase mixture of quality 0.3 with an enthalpy of 300 kJ/kg

And since I'm a fan of engineering visualization, here's a refrigeration cycle on a P-h-T chart, generated in Maple with CoolProp.

Here's a Maple application that uses CoolProp to analyze a refrigeration cycle (together with a CoolProp DLL for 64-bit Windows).

Analysis_of_a_Refrig.zip

I'd like to encourage anyone with an interest in thermophysical modeling to download CoolProp and explore its functionality. It's certainly opened up a new field of applications for me.

Samir

Modelling Flow Inertia in Three Coupled ...

Posted: Samir Khan 2066 Products: Maple , MapleSim

August 30 2012

5 3

1 Introduction

Three tanks are connected with two pipes. Each tank is initially filled to a different level. A valve in each pipe opens, and the liquid levels gradually reach equilibrium. Here, we model the system in MapleSim (including the influence of flow inertia), and also derive and solve the analytical equations in Maple.

Modeling Water Hammer in MapleSim...

Posted: Samir Khan 2066 Product: MapleSim

December 21 2011

9 1

Liquid flowing in a pipeline has inertia. If a valve at the end of the pipeline suddenly closes, a pressure surge hits the valve, and travels through the pipeline at the speed of sound. The damping effect of fluid friction gradually attenuates the pressure wave.

This phenomenon is called water hammer and can cause damage significant damage, sometimes even rupturing the pipeline.

The pressure wave often produces audible sound. If you’ve ever heard...

3D Quaternions...

Posted: Samir Khan 2066 Product: Maple

November 04 2011

4 7

@ThU

Download Quaternion_Fractals_.mw

Not in the same league as the "Mandelbulb" pictures you may be referrng to, but a couple of years ago I messed around with plotting 3D Quaternions in Maple. Pictures in the attached worksheet

Samir