Last Wednesday, Dr. Xuefeng Li gave us a very interesting seminar on the area of simulation --An incremental design based on flow simulation.

Dr. Li's research is very useful in the industry. Dr. Li gave us some examples to show how this method works. From his explanation, we can see that this method is a very good tool for car designers. Car designers can use this method to simulate the air flow that surrounds the car. From the analysis of the simulation data, car designer can make modification and improve the body shape of the car.

Dr. Li first show us an interactive system for a incremental engineering design. The flow chart of the system show us that the initialization is not always necessary since the disign evaluator can always give us a useful suggestion. From the design evaluator, we can decide how much the modification, geometry would be. And then decide on whether we should reuse the data plus some tiny variation of data or total reinitialization of data.

Dr. Li then described the process of blob method. The whole process contains blob creation, potential flow creation blob tree creation, velocity evaluation, and blob translation. The blob tree is created by patitioning a big blob area into four small square, and do the same process recursively.

At last, Dr. Li explain why this method used the non-grid way rather than grid way and give some examples about how to speed the process by isolating non-relevant blobs.