The heat transfer and flow characteristics of air jet impingement on a curved surface are investigated with computational fluid dynamics(CFD)approach.The first applied model is a one-equation SGS model for large eddy ...The heat transfer and flow characteristics of air jet impingement on a curved surface are investigated with computational fluid dynamics(CFD)approach.The first applied model is a one-equation SGS model for large eddy simulation(LES)and the second one is the SST-SAS hybrid RANS-LES.These models are utilized to study the flow physics in impinging process on a curved surface for different jet-to-surface(h/B)distances at two Reynolds numbers namely,2960 and 4740 based on the jet exit velocity(U_e)and the hydraulic diameter(2B).The predictions are compared with the experimental data in the literature and also the results from RANS k-εmodel.Comparisons show that both models can produce relatively good results.However,one-equation model(OEM)produced more accurate results especially at impingement region at lower jet-to-surface distances.In terms of heat transfer,the OEM also predicted better at different jet-to-surface spacings.It is also observed that both models show similar performance at higher h/B ratios.展开更多
O348 2001032119弯曲表面上光的临界反射现象及其应用=Criticallight reflection from curved surface and its applications[刊,中]/杨宗立,苗润才(陕西师范大学物理系.陕西,西安(710062))∥光子学报.-2000,29(4).
Arc Mouse The Arc Mouse is for those who nd the desk just that little bit too far away. Everyone knows how hard it is to control the direction of the arrow on a computer screen when the mouse is resting on legs, laps,...Arc Mouse The Arc Mouse is for those who nd the desk just that little bit too far away. Everyone knows how hard it is to control the direction of the arrow on a computer screen when the mouse is resting on legs, laps, or sofa armrests.展开更多
Tateyama Kagaku Industry Co.已研发出一种用于染料敏化太阳能电池 （Dye Sensitized Solar Cell; DSSC）正极的新材料，除可取代目前价昂白金（价格为1／100）而使太阳能电池成本降低一半之外，也拥有适用弯曲表面的优点。报导指出，...Tateyama Kagaku Industry Co.已研发出一种用于染料敏化太阳能电池 （Dye Sensitized Solar Cell; DSSC）正极的新材料，除可取代目前价昂白金（价格为1／100）而使太阳能电池成本降低一半之外，也拥有适用弯曲表面的优点。报导指出，此种新电池材料是由碳奈米管与纤维素添加剂混合而成，具有与白金电极相同的高导电能力，预计一年内便可量产供货。展开更多
Nikkalite^TM UL V512反光膜是由恩希爱（杭州）化工有限公司生产的胶囊型反光膜，该反光膜是用大小均匀、高折射率的玻璃微珠和树脂制成，玻璃微珠的一半覆盖有近100％纯的铝，每个微珠的包铝半球均匀置于合成树脂内。反光膜的透明面...Nikkalite^TM UL V512反光膜是由恩希爱（杭州）化工有限公司生产的胶囊型反光膜，该反光膜是用大小均匀、高折射率的玻璃微珠和树脂制成，玻璃微珠的一半覆盖有近100％纯的铝，每个微珠的包铝半球均匀置于合成树脂内。反光膜的透明面膜是不因受热而伸缩的薄膜，具有物理稳定性和极好的柔韧性，易于操作加工。面膜与基膜由特殊花纹的支架强力粘接，使反光膜具有抗剥离性能。V512反光膜是专门为一些弯曲表面特别设计的高强级反光膜。展开更多
文摘The heat transfer and flow characteristics of air jet impingement on a curved surface are investigated with computational fluid dynamics(CFD)approach.The first applied model is a one-equation SGS model for large eddy simulation(LES)and the second one is the SST-SAS hybrid RANS-LES.These models are utilized to study the flow physics in impinging process on a curved surface for different jet-to-surface(h/B)distances at two Reynolds numbers namely,2960 and 4740 based on the jet exit velocity(U_e)and the hydraulic diameter(2B).The predictions are compared with the experimental data in the literature and also the results from RANS k-εmodel.Comparisons show that both models can produce relatively good results.However,one-equation model(OEM)produced more accurate results especially at impingement region at lower jet-to-surface distances.In terms of heat transfer,the OEM also predicted better at different jet-to-surface spacings.It is also observed that both models show similar performance at higher h/B ratios.
文摘O348 2001032119弯曲表面上光的临界反射现象及其应用=Criticallight reflection from curved surface and its applications[刊,中]/杨宗立,苗润才(陕西师范大学物理系.陕西,西安(710062))∥光子学报.-2000,29(4).
文摘Arc Mouse The Arc Mouse is for those who nd the desk just that little bit too far away. Everyone knows how hard it is to control the direction of the arrow on a computer screen when the mouse is resting on legs, laps, or sofa armrests.
文摘Tateyama Kagaku Industry Co.已研发出一种用于染料敏化太阳能电池 （Dye Sensitized Solar Cell; DSSC）正极的新材料，除可取代目前价昂白金（价格为1／100）而使太阳能电池成本降低一半之外，也拥有适用弯曲表面的优点。报导指出，此种新电池材料是由碳奈米管与纤维素添加剂混合而成，具有与白金电极相同的高导电能力，预计一年内便可量产供货。
文摘Nikkalite^TM UL V512反光膜是由恩希爱（杭州）化工有限公司生产的胶囊型反光膜，该反光膜是用大小均匀、高折射率的玻璃微珠和树脂制成，玻璃微珠的一半覆盖有近100％纯的铝，每个微珠的包铝半球均匀置于合成树脂内。反光膜的透明面膜是不因受热而伸缩的薄膜，具有物理稳定性和极好的柔韧性，易于操作加工。面膜与基膜由特殊花纹的支架强力粘接，使反光膜具有抗剥离性能。V512反光膜是专门为一些弯曲表面特别设计的高强级反光膜。
