Featured Blog

Identifying Thermal Bottlenecks and Shortcut Opportunities – Taking Simulation to the Next Level

October 27th, 2010

Simulation has, to date, focused primarily on the prediction of an operating state that is compared to a design acceptable state to judge the compliance of that design. From an electronics cooling perspective that state is often taken as the operating temperature of packaged ICs, most commonly a case (Tc) or junction (Tj) temperature. FloTHERM has, over [...]

Lies, Damned Lies, and “CFD Comparison Charts” – Part II

August 12th, 2010

In my last post I pointed out a very obvious mistake in Blue Ridge Numerics’ “CFD Comparison Chart” of March 19th this year, which incorrectly stated that FloEFD can only handle incompressible sub-sonic flows.
The reason I highlighted this as the most obvious mistake in the “CFD Comparison Chart” is that FloEFD can trace its history [...]

How many frogs does a horse have?

August 10th, 2010

The internet is big. It’s not sentient yet, though Robert Swayer has written a compelling story of how it might ‘Wake‘. In fact it’s far from intelligent at all. Banal comments about “how we ever managed without it” will age so quickly that future historians will assume a typo, more intelligence than we currently have and [...]

An Interview With… Clemens Lasance

July 27th, 2010

Every industry or industry sub-sector has its movers and shakers, its pioneers and thought leaders. These people have likely helped shape and evolve that industry to what it is today and what it may become in the future. For this series of ‘An Interview With…’ blog posts I will be posing the same set of questions [...]

Mechanical Analysis Products Now in Mentor’s Higher Education Program

July 19th, 2010

If you’re involved in CFD in education in any way this will be of interest to you. Since shortly after Flomerics were acquired by Mentor Graphics we’ve been working towards getting out products into Mentor’s Higher Education Program (HEP), and we’ve finally got it done.
To my knowledge, the availability of potentially millions of dollars worth [...]

Red Hot Electronic Thermal Analysis?

July 14th, 2010

The etymology of the phrase ‘red hot’ dates back to the 14th century describing the colour attained by metal as it is heated. When attributed to people it can euphemistically be used to describe passion and attractiveness. Any colourful picture output from a numerical thermal simulation of an electronics system will have red depicting hot and [...]

Sony Vaio laptop in mass ‘recall’

July 1st, 2010

“Authorities in the US have instructed Sony to conduct a recall of its Vaio laptops, after problems with overheating were reported.” started this article on the BBC’s web site.
There is a saying, ” the news is never as good or as bad as it is first reported”. And so it is with this story. It’s not [...]

The art of modelling using CFD. Part VI – Peripheral Boundary Conditions

June 21st, 2010

This final blog in this series focuses on what is sometimes the most ethereal of CFD modelling arts, where and how to define your peripheral boundary conditions. A fancy phrase but in reality no more than deciding where the interface is between what you model and what you don’t. Heat is contemptuous of such divisions, [...]

Nearly Back to Business as Usual

June 4th, 2010

I’ve not posted for a while, which is rather remiss of me. I underestimated the response we would get to our Heatsink 201 webinar, which I gather was our most popular ever, and the number of questions that people would ask. I had around 120 questions, which after removing duplicates and those to do with [...]

The art of modelling using CFD. Part V – Grid

June 4th, 2010

Any simulation technology based on an approach of subdividing a 3D model into many tessellated control volumes (e.g. the finite volume method) will be affected by the shape and size of those ‘mesh cells’ or ‘grid’. How fine should the mesh be to resolve the physics of the model being simulated? Good question. I used [...]

The art of modelling using CFD. Part IV – Fans

May 20th, 2010

Sometimes the ability to apply artistic interpretation of your virtual product to your simulation model of it is limited or dictated (take your pick) by the available capabilities of that simulation tool. CFD simulation is quite a young technology, application to electronics cooling newer still, a mere 21 years old. Always pushing the limit of available computing resource, always adapting [...]

The art of modelling using CFD. Part III – TIGs

May 17th, 2010

Never trust a TLA (three-letter acronym) or those who use them, unless the abbreviation provides some value in terms of repetitive usage  or is accepted as an industry standard. Too often TLAs are used as a screen between those who are listening and the incompetence of the person talking. TIGs (thermally insignificant geometries) as a [...]

The art of modelling using CFD. Part II – Grilles

May 13th, 2010

Wiki quote: “A grille is an opening of several slits side by side in a wall or metal sheet or other barrier, usually to let air or water enter and/or leave but keep larger objects including people and animals in or out.” For electronic products that need to be kept cool, getting cool air in [...]

The art of modelling using CFD. Part I – What happens if you cross art with science?

May 11th, 2010

Considering that CFD (Computational Fluid Dynamics) is an advanced mathematical method for predicting fluid flow and heat transfer using a computational software approach I find it paradoxical that it is often as much an art as it is a science. A model by its very definition is a representation of something. A computer model is a virtual representation [...]