PPT-Modification of a Mesoscale Model Planetary Boundary Layer

David E Jahn WESEP594 Fall 2013 Wind Energy Science Engineering and Policy WESEP Program Iowa State University Background With continued increase in wind power integration as part of the US electric grid wind variability is of concern. Pressure gradient is found from . freestream. (external) velocity . field. Boundary layer equation:. x. z. Effect of Pressure Gradient on the flow in a Boundary Layer. In the accelerating part of the stream,. David E. Jahn. WESEP594. Fall . 2013. Wind Energy Science Engineering and Policy (WESEP) Program. Iowa State University. Background. With continued increase in wind power integration as part of the US electric grid, wind variability is of concern.. . Drag force. The surrounding fluid exerts pressure forces and viscous forces on an object. .. The components of the resultant force acting on the object immersed in the fluid are the drag force and the lift force. . Mesoscale energy sources. Gage and . Nastrom. (1985). [shifted x10 to right]. Note two spectral extremes:. (a) A maximum at about 2000 km. (b) A minimum at about 500 km. 1. 100. 10. 1000. wavelength [km]. William Ahue. University of Wisconsin – Madison. Dept. of Atmospheric and Oceanic Sciences. Department Seminar. 28. April 2010. Advisor:. Prof. Ankur Desai. What to Expect. Motivation and Background. Computer Implementation. Groundwater Hydraulics. Daene C. McKinney. 1. Groundwater Vistas. Groundwater Modeling Environment. Graphic User Interface (GUI) for MODFLOW and other models. Imports a wide variety of files. NCAR is funded by the National Science Foundation. Richard . Rotunno. NCAR, Boulder CO. http://. www.mmm.ucar.edu/people/rotunno. /. Outline. Rotating Flow / No Boundary . Rotating Flow / Frictional Boundary Layer. Some Notes on Trajectory Starting Height(s). Aug 23, 2016 (initial version). Dr. Mark Cohen, NOAA Air Resources Laboratory. You have some measurements at the ground, and want to do some back-trajectories to help interpret the measurements. . Viscous effects confined to within some finite area near the boundary → . boundary layer. In unsteady viscous flows at low . Re. (impulsively started plate) the boundary layer thickness . δ. . grows with time. In a flow, the boundary layer represents a (relatively) thin layer of fluid that is nearest the solid boundary. 87-351 Fluid Mechanics. [ physical interpretation: what are we doing today? ]. The behaviour of the boundary layer is very different from that of the fluid above it. p. arameterizations and their effects in the model world. Matt Vaughan. ATM 621. What is the Planetary Boundary Layer (PBL)?. The bottom layer of the troposphere. Often turbulent and capped by statically stable air. Circulations in the ABL, and the MJO . Richard H. Johnson. Colorado State University. West Pacific Warm Pool, early Dec 1992 (. Xin. Lin). & Paul . Ciesielski. , Jennifer . Cotturone. , Andy Newman, Brian . Intercomparison. of state-of-the-art . models. Bjarke Tobias Olsen (. btol@dtu.dk. ). Andrea . N. Hahmann. Anna Maria . Sempreviva. Jake Badger. Hans E. Jørgensen. Introduction. Objective. Question. Chris Onof. 1. , Yuting Chen. 1. , Li-Pen Wang. 1,2. , Amy Jones. 3. , and Susana Ochoa Rodriguez. 4. 1. Dept. of Civil and Environmental Engineering, Imperial College London, London, United Kingdom.