"opposite flow" is correct and usable in written English.
You can use it to refer to two things or paths that are going in the opposite direction of each other. For example, "The rivers from the two neighboring cities flow in opposite directions."
A cold stream (low-pressure MR) is in thermal contact with opposite flow of two hot streams (high-pressure MR and NG feed) at the same time.
The flow of one component is proportional to its concentration difference, and in an equal countercurrent experiment this is balanced by an equal and opposite flow of the other component.
The combustor has the function of reducing wall heat loss, extending residence time and avoiding radical chemical quenching with a self-thermal insulation concept in which heat loss reduction is obtained by the opposite flow directions between thermal energy transfer and mass flow.
The experimental data show that the water flux by diffusion from the cathode to the anode is higher than the opposite flow flux of water due to electro-osmotic drag (EOD) at a given current density, resulting in a net water transport from the cathode to the anode.
However, we can represent a bidirectional link using two directed links having opposite flow directions.
The development of two opposite flow directions was observed within the area in between the plates.
Carter et al. (1976) did detect simultaneous opposite flowing electric current at different altitudes during the Doppler radar measurements in Western Africa.
Opposite flows occur as well, from ecological knowledge to archaeology and urban systems, toxicology, and medicine (Sjögren and Lamentowicz 2008; Grimm et al. 2000; Van Straalen 2003; Zu Dohna et al. 2009, respectively).
While a lot is known about the 'physics' of crowd motion, such as the organization emerging around bottlenecks [6], [7], the segregation of opposite flows in pedestrian counterstreams [8], [9], [10], or the turbulent movement in extremely dense crowds [11], [12], it is surprising that social interactions among pedestrians in crowd have been largely neglected.
Our approach is based on the following effective strategy: promoters in both strands of mtDNA are concentrated in a region containing only Phe-tRNA genes in human and rat, which produces opposite flows of polymerases that compete mostly outside this region.
In the counterflow arrangement of Figure 18.8(b), the fluids enter at opposite ends, flow in opposite directions, and leave at opposite ends.
