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Mechanical Engineering
Phone: (208) 885-6579
Toll-free: 88-88-UIDAHO
Fax: (208) 885-9031
Email: medept@uidaho.edu

Engineering Physics (EP)
Room 324K

875 Perimeter Drive MS 0902
Moscow, ID 83844-0902


Contact Denise Engebrecht
Phone: (208) 364-6123
Fax: (208) 364-3160
Email: denisee@uidaho.edu

Idaho Water Center
322 E. Front Street
Boise, ID 83702


Idaho Falls

Contact Debbie Caudle
Phone: (208) 282-7983
Fax: (208) 282-7929
Email: debrac@uidaho.edu

1776 Science Center Drive, Suite 306
Idaho Falls, Idaho 83402

Distance Education

Engineering Outreach
Phone: (208) 885-6373
Toll-free: (800) 824-2889
Fax: (208) 885-9249
E-mail: outreach@uidaho.edu


Ralph Budwig

Ralph Budwig, Ph.D., P.E.

Office: 322 East Front Street, Suite 340
Phone: 208-364-6164
Email: rbudwig@uidaho.edu
Mailing Address: 322 E Front Street
Suite 242
Boise, Idaho 83702

College of Engineering
Mechanical Engineering Department
Boise Engineering Director, Professor

Campus Locations: Boise
With UI Since 1985

  • Research/Focus Areas
    • Experimental and theoretical fluid dynamics
    • turbulence
    • optical, acoustic, and thermal measurements techniques
    • and experimental methods. Laboratory pedagogy.
  • Biography

    Dr. Ralph Budwig, is a professor in the Mechanical Engineering Department at the University of Idaho in the area of experimental fluid dynamics. He is currently located on the Boise campus of the University of Idaho and is the Director of Engineering for the Boise campus and the Director of the Center for Ecohydraulics Stream Laboratory, a $2M+ facility with multi-university participation. Dr. Budwig received his Ph.D. from Johns Hopkins University in 1985 and has worked as a guest researcher in several laboratories in the United States and Canada since that time. His areas of specialization include experimental and theoretical fluid dynamics; turbulence; optical, acoustic, and thermal measurements techniques; and experimental methods. Dr. Budwig has taught extensively in the experimental methods area including required undergraduate courses as well as a specialized graduate level course on the subject of experimental methods in fluid dynamics.

  • Selected Publications

    Research Publication Honors

    Conder, Thomas T., Skifton, Richard S., and Budwig, Ralph S.  “Particle image velocimetry measurements in a representative gas-cooled prismatic reactor core model: Flow in the coolant channels and interstitial bypass gaps,” ASME Publication IMECE2012-87549, November 9 -15, 2012, Houston, Texas.

    Ralph S. Budwig, Michael J. Anderson, Gabriel Putnam, and Chris Manning. 2010 Ultrasonic particle size fractionation in a moving air stream.  Ultrasonics, 50, 26-31.

    Stephens, Terrance L. and Budwig, Ralph S. 2007 Three-axis acoustic device for levitation of droplets in an open gas stream and its application to examine sulfur dioxide absorption by water droplets.  Rev. Sci. Instrum., 78, 01490-1 to 11490-8.

    McIlroy Jr, H.M. and  Budwig, R.S. 2007 The boundary layer over turbine blade models with realistic rough surfaces. ASME Journal of Turbomachinery, 129, 318 – 330.

    Egelhoff, C.J., Budwig, R.S., Elger, D.F., Khraishi, T.A., and Johansen, K.H. Model studies of flow in abdominal aortic aneurysms during resting and exercise conditions. J. Biomechanics, 32, 1319-1329 (1999)

    Elger, D.F., Blackketter, D.M., Budwig, R.S., and Johansen, K.H. 1996. The influence of shape on the stresses in model abdominal aortic aneurysms. ASME Journal of Biomechanical Engineering 118, 326-332.

    Budwig, R. 1994. Refractive index matching methods for liquid flow investigations. Experiments in Fluids 17, 350-355

  • Research Projects
    • Transitional boundary layers studies with elevated free-stream turbulence forcing
    • Characterization of best practice hydraulic conditions for Lamprey passage structures
    • Modeling of building energy performance
  • Awards and Honors
    • Special Recognition at University of Idaho Commencement, Boise, May 1, 2013

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