Tag Archives: simulation

How Quickly Can the Matrix Be Solved?

Posted on May 23, 2016 by R.P. Churchill

The solution was finally made to run last week. Today the question is how fast the thing runs. My feel for the answer to this question has to do with the context in which I first asked it. From 1994 … Continue reading →

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Static and Dynamic Coefficients in Matrix Thermal Solutions

Posted on May 17, 2016 by R.P. Churchill

Recalling yesterday’s initial heat balance equation for each node: it should be noted that the values of both the specific heat and the thermal conductivity of steel are themselves functions of temperature. That means that these values need to be … Continue reading →

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Reverse Engineering Or… What Was It I Was Trying To Do There?

Posted on February 23, 2016 by R.P. Churchill

While continuing the process of turning the JavaScript graph widget into an object I found I needed to create labels of various kinds, which you see added in the examples below. I also wanted to test out some more of … Continue reading →

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Checking My Steam Table Functions

Posted on February 17, 2016 by R.P. Churchill

While I was working out a steam table page yesterday I found it necessary to graph the functions out as a means of verifying them.  Here’s the first graph I created in JavaScript.  It shows not only the curve of … Continue reading →

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Steam Tables (and Thermodynamic Properties of Fluids In General)

Posted on February 16, 2016 by R.P. Churchill

A little while ago I was ruminating on the subject of needing to know the thermodynamic properties of materials before you could do simulations of those materials. I therefore figured I’d spend the week dusting off some old functions I’d … Continue reading →

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Simulation: Continuing Yesterday’s Analysis

Posted on February 2, 2016 by R.P. Churchill

Yesterday I analyzed some of the considerations involved in modeling a section of a petrochemical refining process, namely that of hydrodesulfurization. That is adding hydrogen to hydrocarbons containing sulfur in the presence of a catalyst at an elevated temperature so … Continue reading →

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Simulations: What Gets Modeled And What Doesn’t

Posted on February 1, 2016 by R.P. Churchill

When I’m not flogging away at code these days I’m thinking about continuous simulations and the details that get modeled within them. Specifically I’ve been reading about and thinking about operations in petrochemical refineries, and even more specifically certain classes … Continue reading →

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The Ultimate Limits of Simulation

Posted on January 25, 2016 by R.P. Churchill

Last time I discussed the factors that drive the scale of any simulation or business system. One a less practical, more theoretical, more fun note, we might ask just how far a digital simulation can go? What kind of scope … Continue reading →

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What Drives The Scale Of A Business Or Simulation System?

Posted on January 21, 2016 by R.P. Churchill

The scale of a business or simulation (continuous or discrete-event) system can be driven by a number of factors. Scale can be measured in terms of CPU cycles, communication bandwidth, disk storage, dynamic memory usage, power consumption, and perhaps other … Continue reading →

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Discrete-Event Simulation vs. Business Logic

Posted on January 20, 2016 by R.P. Churchill

I wanted to continue yesterday’s discussion by describing some differences between discrete-event simulations and systems that might be implemented to carry out business logic. The first diagram below shows a model of privately owned vehicles and commercial vehicles passing through … Continue reading →

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