CFD （computational fluid dynamics） is following the trend of CAD and FEA （finite element analysis） to undergraduate education especially with recent advances in commercial codes. It will soon take its place as an ...CFD （computational fluid dynamics） is following the trend of CAD and FEA （finite element analysis） to undergraduate education especially with recent advances in commercial codes. It will soon take its place as an expected skill for new engineering graduates. CFD was added as a component to an experiment in a junior level fluid mechanics course. The objectives were to introduce CFD, as an analysis tool, to the students and to support the theoretical concepts of the course. The students were asked to complete an experimental two-dimensional study for a wing in a wind tunnel, to use CFD to simulate the flow, and to predict the aerodynamic lift using CFD as well as the experimentally obtained pressure distribution. In addition, they had to compare their results to published data for the studied wing. Details of the course, the wind tunnel test and the CFD simulations are presented. Samples from the students＇ work are used in the discussion. The lab activities were successfully completed by the students and the learning objectives were well addressed. One of the valuable outcomes from this lab was the opportunity for the students to integrate multiple fluid mechanics analysis tools and learn about the limits for each tool. CFD also enhanced the learning in the lab activities and increased students＇ interest in the subject.展开更多
The ability to employ the language as a communicational tool often serves as a measure of one＇s speaking success in the language learning class. This research sought to investigate the effect of learners＇ autonomous...The ability to employ the language as a communicational tool often serves as a measure of one＇s speaking success in the language learning class. This research sought to investigate the effect of learners＇ autonomous textbook selection on the speaking ability of Iranian English as foreign language （EFL） learners. Moreover, finding and analyzing factors considered by the learners in selecting the textbooks were another aim of this research. Sixty Iranian intermediate EFL learners from the Simin Language Institute in Ramsar, Mazandaran, Iran, were selected as the participants of the study based on their scores on Oxford Placement Test. This test determines the level of the students＇ English proficiency. These participants were randomly assigned into the control and experimental groups. An interview procedure was run as their pretest. The experimental group studied from their selected books, besides the researcher＇s teaching in the class. After 16 sessions, a posttest, the same as the pretest, was run as well. The quantitative results indicated the superior performance of the experimental group over the control group. Furthermore, an analysis of the Litz＇s （2000） questionnaire shows that learners considered criteria such as practical considerations, layout and design, activities, skills, language type, subject and content of the selected books.展开更多
文摘CFD （computational fluid dynamics） is following the trend of CAD and FEA （finite element analysis） to undergraduate education especially with recent advances in commercial codes. It will soon take its place as an expected skill for new engineering graduates. CFD was added as a component to an experiment in a junior level fluid mechanics course. The objectives were to introduce CFD, as an analysis tool, to the students and to support the theoretical concepts of the course. The students were asked to complete an experimental two-dimensional study for a wing in a wind tunnel, to use CFD to simulate the flow, and to predict the aerodynamic lift using CFD as well as the experimentally obtained pressure distribution. In addition, they had to compare their results to published data for the studied wing. Details of the course, the wind tunnel test and the CFD simulations are presented. Samples from the students＇ work are used in the discussion. The lab activities were successfully completed by the students and the learning objectives were well addressed. One of the valuable outcomes from this lab was the opportunity for the students to integrate multiple fluid mechanics analysis tools and learn about the limits for each tool. CFD also enhanced the learning in the lab activities and increased students＇ interest in the subject.
文摘The ability to employ the language as a communicational tool often serves as a measure of one＇s speaking success in the language learning class. This research sought to investigate the effect of learners＇ autonomous textbook selection on the speaking ability of Iranian English as foreign language （EFL） learners. Moreover, finding and analyzing factors considered by the learners in selecting the textbooks were another aim of this research. Sixty Iranian intermediate EFL learners from the Simin Language Institute in Ramsar, Mazandaran, Iran, were selected as the participants of the study based on their scores on Oxford Placement Test. This test determines the level of the students＇ English proficiency. These participants were randomly assigned into the control and experimental groups. An interview procedure was run as their pretest. The experimental group studied from their selected books, besides the researcher＇s teaching in the class. After 16 sessions, a posttest, the same as the pretest, was run as well. The quantitative results indicated the superior performance of the experimental group over the control group. Furthermore, an analysis of the Litz＇s （2000） questionnaire shows that learners considered criteria such as practical considerations, layout and design, activities, skills, language type, subject and content of the selected books.
