Advances In Digital Computer Technology Research Articles

Development of a New Innovative Conceptual Design for Horizontal Spray Dryer via Mathematical Modeling

ABSTRACT With advances in digital computer technology it is now possible to employ mathematical models to accelerate the innovation process in most industrial sectors. This article presents an illustration of this process to arrive at a new conceptual design for the traditional spray-drying process. Although not commonly recognized, there are some advantages to orienting the spray in a horizontal direction rather than the conventional vertical one. This requires the spray chamber to be redesigned completely without any prior guidance based on empirical data or observations. Here we have used a computational fluid dynamic model that has been validated with data for conventional vertical spray dyers to arrive at several conceptual designs of a horizontal spray dryer (HSD). Several stages in the evolution of the HSD design concept are presented and discussed. It is shown that use of a validated mathematical model can speed up the development process for an innovative product or process with very substantial savings in time, effort, and cost. This article presents simulation results for several spray chamber designs and points out the importance of the design of the air inlet and outlet arrangement for optimal efficiency and effectiveness.

Overview of imaging science.

The traditional disciplines of science are grounded in the observation and measurement of object properties. Recent advances in digital computer technology have spawned numerous computer-based imaging systems that extend the range of observation and measurement into realms that would otherwise be inaccessible. More importantly, the same set of principles, concepts, strategies, and methods may be used to address the generic issues involved in the production and use of all digitized images. Recognition of this fact is giving rise to the new discipline of imaging science, with its own intellectual agenda.

System Aspects of Future Airborne Computers

Both civil and military aircraft are increasing in size and complexity and the range of height and speed over which they operate is extending. At the same time, cost of training aircrew is exerting pressure on managements to reduce crew numbers, usually by eliminating the need for specialists. These more expensive aircraft with smaller crews justify more elaborate computing and control systems to exploit their military capability or commercial earning power. Therefore, the need for the more extensive use of airborne computers is already well established.Due to high cost and poor reliability, analogue computing systems have only marginally satisfied the demands for increased automation in aircraft. However, recent advances in digital computer technology offer advantages in size, accuracy, flexibility and particularly in reliability over analogue methods and show promise that digital computer systems can be designed to meet the future requirements for airborne computing.