Tom Walski, Ph.D., P.E.

Thomas Walski is a senior product manager at Bentley Systems, Inc. He has 40 years of experience in applied hydraulics. He is author of hundreds of journal papers and conference presentations and is the author or co-author of several books. He has won numerous awards for his work such as the best distribution and plant operation paper in the Journal AWWA on three occasions. In addition to developing software, he has served as a distribution system operations manager, engineering manager for a large water company, executive director at a regional sewer system and a university professor.

I Want Help Now

September 15, 2023

We’ve all been there. You have a problem with your internet, a new dishwasher, or software … Typically, your next step is to go on the service..

How to (Successfully) Do a Distribution System Shutdown

August 25, 2023

Valves tend to be the most ignored appurtenances in our systems … until you need them, then they are the most valuable. If you never had to shut down..

When is First-Order Chlorine Decay Really Second-Order Decay?

August 8, 2023

I occasionally hear people say they use a second-order equation to model chlorine decay when in a perfect world, chlorine decay should follow a..

Does viscosity matter in pipe head loss calculations?

July 21, 2023

The title of this blog comes from a question asked by one of our Bentley OpenFlows users. If the temperature of water in a pipe changes, does head..

When is a VFD a Pump?

July 11, 2023

The correct answer is “Never.” A variable frequency drive (VFD) is generally described as a “motor control device that controls the speed of AC..

Do You Need Help? We Have It.

June 20, 2023

We regularly seek feedback from our users on how we’re doing. In a recent survey, we received excellent scores across the board on our OpenFlows..

A 2.5 Inch Hydrant Outlet is 2.5 Inches. Right?

May 31, 2023

Not quite. What exactly do you get with a 2 ½ inch hydrant outlet? It depends a lot on where you are and when the hydrants were manufactured. There..

Pre-Computer Computation

May 26, 2023

Engineering usually involves a good deal of time solving complicated systems of equations. A century ago, engineers spent much of their time..

Water Distribution System Analysis History

May 16, 2023

The story of the history of water distribution system analysis (WDSA) is pretty fascinating, at least to me. There have been a large number of..

Implementing Innovation in Water Distribution Systems—Where do you Start?

May 1, 2023

In last week’s blog, Neil Grigg, one of the most respected water resources engineers for several decades, discussed how innovation could solve a lot..