Practical demonstration and visualisation are essential elements of fluid flow study.
This Drainage and Seepage Tank has been designed to allow students to make an experimental study of flow through permeable media.

Practical demonstration and visualisation are essential elements of fluid flow study. This Armfield unit may be used in two principal fields of study. The first involves detailed investigation of mobile bed situations. These may be in relation to water courses or civil engineering structures.

The second field involves two dimensional flow visualisation. This may be undertaken using the Ahlborn (c.1902) dust indicator technique or by any other suitable method of flow visualisation.

This improved version of the Armfield sediment transport teaching facility allows demonstration of the full range of bedforms that arise in a mobile bed as the flow and/or slope are increased.
The channel can be used to perform most of the experiments and demonstrations usually undertaken in much larger laboratory flumes, but at much lower cost and without the need for technician back-up. The equipment is portable, and therefore may be used in the classroom as well as in the laboratory. Although too small for research applications, this demonstration flume can play a useful role in any course concerning the mechanics of open channel flow and sediment transport, including those in Departments of Civil Engineering, Geology and Physical Geography.

This apparatus sets out to demonstrate, on a small scale, some of the physical processes found in hydrology. These fall into two related categories: the relationship between rainfall and runoff from catchment areas of variable permeability and the abstraction of ground water by wells, with or without surface recharge from rainfall. Thus it is concerned with that part of the hydrological cycle bounded by the arrival of 'net rainfall' on the ground surface and the catchment runoff by surface streams.

This bench-mounting apparatus is capable of demonstrating, on a small scale, the hydrological principles of ground water flow and the applications of these to certain engineering constructions. The demonstrations are of interest to geologists and geographers concerned with sub-surface water flows.
The equipment is valuable in any practical coursework related to water resource engineering. Demonstrations of flood risks associated with land drainage works, the use of wells for both water abstraction, de-watering and the drainage of lakes and polders are all readily performed.
The Armfield Ground Water Flow Unit allows simple three dimensional flow situations to be set up quickly and measurements of piezometric levels taken at appropriate positions within the model.

This apparatus demonstrates some of the major physical processes found in hydrology and fluvial geomorphology, including: rainfall hydrographs for catchment areas of varying permeability; the abstraction of ground water by wells, both with and without surface recharge from rainfall; the formation of river features and effects of sediment transport.
Realistic results can be obtained from this small scale, floor standing apparatus, which can be conveniently located and requires no special services.

• Demonstrate flow through both open channels and closed    conduits using this highly visual accessory to the F1-10 Hydraulics Bench
• Unique elevating bed section and models of various hydraulic structures allow the difficult concepts of critical flow and energy changes to be clearly demonstrated and analysed
• Working section large enough for the various flow phenomena to be seen clearly by a group of students - enables a teacher to provide practical demonstrations at the same time as explaining the theory
• Demonstrations can be set up quickly and easily, including varying the upstream and downstream flow conditions
• Ideal for student project work - user constructed models of different hydraulic structures can be evaluated

A glass sided tilting flume with fabricated all stainless steel bed. A working cross-section of 300mm wide by 450mm deep and available in standard working lengths of 5m, 7.5m, 10m and 12.5m. Longer lengths are available to special order in increments of 2.5m.
Completely self-contained and comprising the working section, moulded inlet and discharge tanks, a series of sump tanks, a pump, an electronic flow meter, a jacking system and a control console.

New research flumes available as standard
   > Standard Flumes
   > Special Flumes, Tanks and Basins
   > Ancillary Equipment
      • Sediment Transport Facilities
      • Mono and Random Wave Makers
      • Instrumentation
Armfield has been designing and supplying open channel facilities (sometimes referred to as flumes) to hydraulic laboratories throughout the world for over 50 years.