| A Three-Dimensional Prediction Method for Thermal Diffusion |
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| 作者单位： | WANG Lixia，SUN Yinglan and ZHENG Lianyuan Associate Professor，Insititute of Environmental Oceanography，Ocean University of Qingdao，Qingdao 266003，China.Professor，Insititute of Environmental Oceanography，Ocean University of Qingdao，Qingdao 266003，China. Lecturer，Insititute of Environmental Oceanography，Ocean University of Qingdao，Qingdao 266003，China. |
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| 摘 要： | A three-dimensional,first order turbulence closure,thermal diffusion model is described inthis paper.The governing equations consist of an equation of continuity,three components of momentum,conservation equations for salt,temperature and subgridscale energy,and an equation of state.In the mod-el,according to the hypothesis of Kolmogorov and Prandtl,the viscosity coefficient of turbulent flow ofhomogeneous fluid is related to the local turbulent energy,and the horizontal and vertical exchangecoefficients of mass,heat and momentum are computed with the introduction of subgridscale turbulenceenergy.The governing equations are solved by finite difference techniques.This model is applied to theJiaozhou bay to predict thermal pollution by the Huangdao power plant.An instantaneous tidal currentfield is computed,then the distribution of temperature increment is predicted,and finally the effect of windstress on thermal discharge is discussed.
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A Three-Dimensional Prediction Method for Thermal Diffusion |
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| Authors: | WANG Lixia SUN Yinglan and ZHENG Lianyuan Associate Professor Insititute of Environmental Oceanography Ocean University of Qingdao Qingdao ChinaProfessor Insititute of Environmental Oceanography Ocean University of Qingdao Qingdao China Lecturer Insititute of Environmental Oceanography Ocean University of Qingdao Qingdao China |
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| Institution: | WANG Lixia,SUN Yinglan and ZHENG Lianyuan Associate Professor,Insititute of Environmental Oceanography,Ocean University of Qingdao,Qingdao 266003,China.Professor,Insititute of Environmental Oceanography,Ocean University of Qingdao,Qingdao 266003,China. Lecturer,Insititute of Environmental Oceanography,Ocean University of Qingdao,Qingdao 266003,China. |
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| Abstract: | A three-dimensional, first order turbulence closure, thermal diffusion model is described in this paper. The governing equations consist of an equation of continuity, three components of momentum, conservation equations for salt, temperature and subgridscale energy, and an equation of state. In the model, according to the hypothesis of Kolmogorov and Prandtl, the viscosity coefficient of turbulent flow of homogeneous fluid is related to the local turbulent energy, and the horizontal and vertical exchange coefficients of mass, heat and momentum are computed with the introduction of subgridscale turbulence energy. The governing equations are solved by finite difference techniques. This model is applied to the Jiaozhou bay to predict thermal pollution by the Huangdao power plant. An instantaneous tidal current field is computed, then the distribution of temperature increment is predicted, and finally the effect of wind stress on thermal discharge is discussed. |
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| Keywords: | three-dimensional turbulence closure thermal diffusion model finite difference techniques subgridscale energy exchange coefficient temperature increment |
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